Thousands march in NYC, around globe over climate

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Climate Change March - New York - 9/21/2014
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Thousands march in NYC, around globe over climate
Marchers make their way across Central Park South during the People's Climate March on September 21 2014, in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders . AFP PHOTO/Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
Musician Sting walks down 6th Avenue during the People's Climate March on September 21, 2014, in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders . AFP PHOTO/Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
Marchers come down 6th Ave during the People's Climate March on September 21 2014, in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders . AFP PHOTO/Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
Actor Leonardo DiCaprio walks down 6th Avenue during the People's Climate March on September 21, 2014, in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders . AFP PHOTO/Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
Children run underneath a large banner with demonstrators gathered for the People's Climate March in New York, U.S., on Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
Marchers come down 6th Ave during the People's Climate March on September 21 2014, in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders . AFP PHOTO/Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
Demonstrators hold signs on a street next to Central Park during the People's Climate March in New York, U.S., on Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
Demonstrators hold signs during the People's Climate March in New York, U.S., on Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
NEW YORK, NY - SEPTEMBER 21: Sting attends The People's Climate March on September 21, 2014 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
Marchers come down 6th Ave during the People's Climate March on September 21 2014, in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders . AFP PHOTO/Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
Demonstrators make their way down Sixth Avenue in New York during the People's Climate March Sunday, Sept. 21, 2014. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
Demonstrators make their way down Sixth Avenue in New York during the People's Climate March Sunday, Sept. 21, 2014. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
Demonstrators make their way down Sixth Avenue in New York during the People's Climate March Sunday, Sept. 21, 2014. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
Demonstrators make their way down Sixth Avenue in New York during the People's Climate March Sunday, Sept. 21, 2014. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
IMAGE DISTRIBUTED FOR AVAAZ - Avaaz Executive Director Ricken Patel delivers a petition to UN Secretary General Ban ki-Moon at the People's Climate March in New York City on Sunday, Sept. 21, 2014. The petition, signed by 2 million people, calls for 100% clean energy worldwide ahead of this week's UN Climate Summit in New York. (Ed Rieker/AP Images for Avaaz)
Marchers lift a banner during the People's Climate March in New York Sunday, Sept. 21, 2014. Thousands of demonstrators filled the streets of Manhattan on Sunday, accompanied by drumbeats, wearing costumes and carrying signs as they urged policy makers to take global action on climate change. (AP Photo/Craig Ruttle)
Demonstrators make their way down Sixth Avenue in New York during the People's Climate March Sunday, Sept. 21, 2014. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
Bird-shaped kites are held in the air as demonstrators make their way down Sixth Avenue during the People's Climate March Sunday, Sept. 21, 2014 in New York. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
IMAGE DISTRIBUTED FOR AVAAZ - More than 100,000 people march through midtown Manhattan on Sunday, Sept. 21, 2014 as part of the People's Climate March, a worldwide mobilization calling on world leaders meeting at the UN to commit to urgent action on climate change and 100% clean energy in New York. (John Minchillo/AP Images for AVAAZ)
IMAGE DISTRIBUTED FOR AVAAZ - More than 100,000 people march through midtown Manhattan on Sunday, Sept. 21, 2014 as part of the People's Climate March, a worldwide mobilization calling on world leaders meeting at the UN to commit to urgent action on climate change and 100% clean energy in New York. (John Minchillo/AP Images for AVAAZ)
Actor and activist Mark Ruffalo, center left, and actor Leonardo DiCaprio, center right, join participants during the People's Climate March in New York Sunday, Sept. 21, 2014. Thousands of demonstrators filled the streets of Manhattan on Sunday, accompanied by drumbeats, wearing costumes and carrying signs as they urged policy makers to take global action on climate change.(AP Photo/Craig Ruttle)
From left, French Foreign Minister Laurent Fabius, primatologist Jane Goodall, former U.S. Vice President Al Gore, New York Mayor Bill de Blasio, and U.N. Secretary General Ban Ki-moon participate in the People's Climate March in New York Sunday, Sept. 21, 2014. Thousands of demonstrators filled the streets of Manhattan on Sunday, accompanied by drumbeats, wearing costumes and carrying signs as they urged policy makers to take global action on climate change. (AP Photo/Craig Ruttle)
From left, French Foreign Minister Laurent Fabius, primatologist Jane Goodall, former U.S. Vice President Al Gore, New York Mayor Bill de Blasio, and U.N. Secretary General Ban Ki-moon participate in the People's Climate March in New York Sunday, Sept. 21, 2014. Thousands of demonstrators filled the streets of Manhattan on Sunday, accompanied by drumbeats, wearing costumes and carrying signs as they urged policy makers to take global action on climate change. (AP Photo/Craig Ruttle)
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
Demonstrators make their way down Sixth Avenue during the People's Climate March Sunday, Sept. 21, 2014 in New York. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
Demonstrators fill Central Park South during the People's Climate March Sunday, Sept. 21, 2014 in New York. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
People fill 58th Street between 8th and 9th Avenue in New York before a climate change protest march Sunday, Sept. 21, 2014. Thousands of people from across the nation are expected in New York City to participate in what's billed as the largest march ever on global warming. (AP Photo/Mel Evans)
Author Malachy McCourt, 83, of New York, awaits the start of the People's Climate March Sunday, Sept. 21, 2014 in New York. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
A New York sightseeing bus stops as a large mother earth float is rolled past during a climate change march Sunday, Sept. 21, 2014, in New York. Thousands of demonstrators filled the streets of Manhattan and other cities around the world on Sunday to urge policy makers to take action on climate change. (AP Photo/Mel Evans)
Young people carry banners and signs as they demonstrate in a climate change march Sunday, Sept. 21, 2014, in New York. Thousands of demonstrators filled the streets of Manhattan and other cities around the world on Sunday to urge policy makers to take action on climate change. (AP Photo/Mel Evans)
A large mother earth float is rolled along 42nd Street in New Yorkduring a climate change march Sunday, Sept. 21, 2014. Thousands of demonstrators filled the streets of Manhattan and other cities around the world on Sunday to urge policy makers to take action on climate change. (AP Photo/Mel Evans)
Actor and activist Mark Ruffalo takes questions before the start of the People's Climate March in New York Sunday, Sept. 21, 2014. Thousands of people from across the nation are expected to participate in what's billed as the largest march ever on global warming. (AP Photo/Craig Ruttle)
Demonstrators make their way down Sixth Avenue in New York during the People's Climate March Sunday, Sept. 21, 2014. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
Demonstrators prepare a sign before the People's Climate March Sunday, Sept. 21, 2014 in New York. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
A woman holds a sign as she is wheeled along 42nd Street in New York during a climate change march Sunday, Sept. 21, 2014. Thousands of demonstrators filled the streets of Manhattan and other cities around the world on Sunday to urge policy makers to take action on climate change. (AP Photo/Mel Evans)
Demonstrators gather along Central Park West before the People's Climate March Sunday, Sept. 21, 2014 in New York. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
People gather near Columbus Circle before the People's Climate March in New York Sunday, Sept. 21, 2014. Thousands of people from across the nation are expected to participate in what's billed as the largest march ever on global warming. (AP Photo/Craig Ruttle)
Demonstrators fill Central Park South during the People's Climate March Sunday, Sept. 21, 2014 in New York. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
A woman holds a sign as she is wheeled along 42nd Street in New York during a climate change march Sunday, Sept. 21, 2014. Thousands of demonstrators filled the streets of Manhattan and other cities around the world on Sunday to urge policy makers to take action on climate change. (AP Photo/Mel Evans)
U.N. Secretary General Ban Ki-moon takes questions after participating in the People's Climate March in New York Sunday, Sept. 21, 2014. Thousands of demonstrators filled the streets of Manhattan on Sunday, accompanied by drumbeats, wearing costumes and carrying signs as they urged policy makers to take global action on climate change. (AP Photo/Craig Ruttle)
Demonstrators make their way down Sixth Avenue during the People's Climate March in New York Sunday, Sept. 21, 2014. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
Actor Leonardo DiCaprio walks down 6th Avenue during the People's Climate March on September 21, 2014, in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders . AFP PHOTO/Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
Marchers come down 6th Ave during the People's Climate March on September 21 2014, in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders . AFP PHOTO/Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
Marchers come down 6th Ave during the People's Climate March on September 21 2014, in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders . AFP PHOTO/Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
Climate activists prepare a 50-foot art piece representing wind and solar energy with masking tape and lights to be documented with long exposure photography, two days before the United Nations Climate Summit, in downtown Cairo, Egypt, Sunday, Sept. 21, 2014. Members from the activist groups Egyptians Against Coal and 350.org acted in concert with a series of events large and small held around the world. (AP Photo/Samuel McNeil)
Marchers sing out as they walk along Sixth Ave. during the People's Climate March in New York Sunday, Sept. 21, 2014. Thousands of demonstrators filled the streets of Manhattan on Sunday, accompanied by drumbeats, wearing costumes and carrying signs as they urged policy makers to take global action on climate change. (AP Photo/Craig Ruttle)
A large mother earth float is rolled along 42nd Street in New York during a climate change march Sunday, Sept. 21, 2014. Thousands of demonstrators filled the streets of Manhattan and other cities around the world on Sunday to urge policy makers to take action on climate change. (AP Photo/Mel Evans)
IMAGE DISTRIBUTED FOR AVAAZ - More than 100,000 people march through midtown Manhattan on Sunday, Sept. 21, 2014 as part of the People's Climate March, a worldwide mobilization calling on world leaders meeting at the UN to commit to urgent action on climate change and 100% clean energy in New York. (John Minchillo/AP Images for AVAAZ)
IMAGE DISTRIBUTED FOR AVAAZ - More than 100,000 people march through midtown Manhattan on Sunday, Sept. 21, 2014 as part of the People's Climate March, a worldwide mobilization calling on world leaders meeting at the UN to commit to urgent action on climate change and 100% clean energy in New York. (John Minchillo/AP Images for AVAAZ)
Elliot Crown of New York, dressed in costume called "Fossil Fool," walks with passersby along 6th Ave. during the People's Climate March in New York Sunday, Sept. 21, 2014. (AP Photo/Craig Ruttle)
Marchers with Bike Bloc roll along 6th Ave. during the People's Climate March in New York Sunday, Sept. 21, 2014. (AP Photo/Craig Ruttle)
Marchers with Bike Bloc roll along 6th Ave. during the People's Climate March in New York Sunday, Sept. 21, 2014. (AP Photo/Craig Ruttle)
Marchers with a group called Backbonecampaign.org from Vashon, Washington, march along 6th Ave. during the People's Climate March in New York Sunday, Sept. 21, 2014. (AP Photo/Craig Ruttle)
Demonstrators make their way down Sixth Avenue in New York during the People's Climate March Sunday, Sept. 21, 2014. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
IMAGE DISTRIBUTED FOR AVAAZ - More than 100,000 people march through midtown Manhattan on Sunday, Sept. 21, 2014 as part of the People's Climate March, a worldwide mobilization calling on world leaders meeting at the UN to commit to urgent action on climate change and 100% clean energy in New York. (John Minchillo/AP Images for AVAAZ)
Demonstrators fill Central Park South during the People's Climate March Sunday, Sept. 21, 2014 in New York. The march, along with similar gatherings scheduled in other cities worldwide, comes two days before the United Nations Climate Summit, where more than 120 world leaders will convene for a meeting aimed at galvanizing political will for a new global climate treaty by the end of 2015. (AP Photo/Jason DeCrow)
A demonstrator holds a sign during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
Demonstrators hold signs during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
Demonstrators hold signs during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
A demonstrator holds a sign during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
Demonstrators hold signs during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
A demonstrator wears a flag as a cape during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
Demonstrators roll a model of the planet Earth down the street during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
Demonstrators hold signs during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
A demonstrator plays a guitar while others hold signs during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
Demonstrators march during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
Demonstrators hold an Adbusters.org American flag during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
A demonstrator holds up a sign during the People's Climate March in New York, U.S., on Sunday, Sept. 21, 2014. The United Nations 2014 Climate Summit is scheduled for Sept. 23. Photographer: Timothy Fadek/Bloomberg via Getty Images
Marchers come down 6th Ave during the People's Climate March on September 21 2014, in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders . AFP PHOTO/Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
French Foreign Minister Laurent Fabius takes part in the 'People's Climate March' on September 21, 2014 in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders. AFP PHOTO/Don Emmert (Photo credit should read DON EMMERT/AFP/Getty Images)
United Nations Secretary-General Ban Ki-moon and his wife Yoo Soon-taek take part in the 'People's Climate March' on September 21, 2014 in New York. Activists mobilized in cities across the globe Sunday for marches against climate change, with one of the biggest planned for New York, where celebrities, political leaders and tens of thousands of people were expected. The march comes before the United Nations Secretary-General Ban Ki-moon convenes a climate change summit of 120 world leaders. AFP PHOTO/Don Emmert (Photo credit should read DON EMMERT/AFP/Getty Images)
NEW YORK, NY - SEPTEMBER 21: United Nations Secretary General Ban Ki-Moon participates in the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
NEW YORK, NY - SEPTEMBER 21: (L-R) Primatologist Jane Goodall, Former U.S. Vice President and environmental activist Al Gore, New York City Mayor Bill deBlasio and United Nations Secretary General Ban Ki-Moon participates in the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
NEW YORK, NY - SEPTEMBER 21: People protest for greater action against climate change during the People's Climate March on September 21, 2014 in New York City. The march, which calls for drastic political and economic changes to slow global warming, has been organized by a coalition of unions, activists, politicians and scientists. (Photo by Andrew Burton/Getty Images)
NEW YORK, UNITED STATES - SEPTEMBER 21: Illuminated UN headquarters is seen during a ceremony ahead of climate march at the UN headquarters in New York, United States on September 21, 2014. The Hollywood star was named United Nations Messenger of Peace on Climate Change. (Photo by Selcuk Acar/Anadolu Agency/Getty Images)
NEW YORK, UNITED STATES - SEPTEMBER 21: Illuminated UN headquarters is seen during a ceremony ahead of climate march at the UN headquarters in New York, United States on September 21, 2014. The Hollywood star was named United Nations Messenger of Peace on Climate Change. (Photo by Selcuk Acar/Anadolu Agency/Getty Images)
NEW YORK, UNITED STATES - SEPTEMBER 21: Illuminated UN headquarters is seen during a ceremony ahead of climate march at the UN headquarters in New York, United States on September 21, 2014. The Hollywood star was named United Nations Messenger of Peace on Climate Change. (Photo by Selcuk Acar/Anadolu Agency/Getty Images)
NEW YORK, UNITED STATES - SEPTEMBER 21: Illuminated UN headquarters is seen during a ceremony ahead of climate march at the UN headquarters in New York, United States on September 21, 2014. The Hollywood star was named United Nations Messenger of Peace on Climate Change. (Photo by Selcuk Acar/Anadolu Agency/Getty Images)
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By VERENA DOBNIK & MICHAEL SISAK

NEW YORK (AP) - Tens of thousands of activists walked through Manhattan on Sunday, warning that climate change is destroying the Earth - in stride with demonstrators around the world who urged policymakers to take quick action.

Starting along Central Park West, most came on foot, others with bicycles and walkers, and some even in wheelchairs. Many wore costumes and marched to drumbeats. One woman played the accordion.

But their message was not entertaining:

"We're going to lose our planet in the next generation if things continue this way," said Bert Garskof, 81, as a family member pushed his wheelchair through Times Square.

He had first heard about global warming in 1967, "when no one was paying much attention," said Garskof, a native New Yorker and professor of psychology at Connecticut's Quinnipiac University.

Organizers said more than 100,000 marched in New York, including actors Mark Ruffalo and Evangeline Lilly. They were joined in midtown Manhattan by United Nations Secretary-General Ban Ki-moon, former Vice President Al Gore and New York City Mayor Bill de Blasio.

On Tuesday, more than 120 world leaders will convene for the United Nations Climate Summit aimed at galvanizing political will for a new global climate treaty by the end of 2015.

"My sense is the energy you see on the streets, the numbers that have amassed here and in other cities around the world, show that something bigger is going on, and this U.N. summit will be one of the ones where we look back and say it was a difference maker," de Blasio said.

Ban agreed.

"Climate change is a defining issue of our time and there is no time to lose," he said. "There is no Plan B because we do not have planet B. We have to work and galvanize our action."

The New York march was one of a series of events held around the world to raise awareness about climate change.

In London, organizers said 40,000 marchers participated, while a small gathering in Cairo featured a huge art piece representing wind and solar energy. In Rio de Janeiro, marchers at Ipanema Beach had green hearts painted on their faces.

(Editor's note: here's a look at more climate change marches around the globe)

58 PHOTOS
Climate Change March - Worldwide - 9/21/2014
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Thousands march in NYC, around globe over climate
Sen. James Inhofe, R-Okla., arrives for work at the Capitol in Washington, Thursday, Dec. 4, 2014. Following the success of the GOP in the midterm elections, the 80-year-old Republican from the oil-producing state of Oklahoma is in line to chair the Senate Environment and Public Works Committee when his party assumes control of the Senate next month. Sen. Inhofe is considered by critics to be one of the most notorious deniers of human-induced climate change, in no small part due to the book he authored in 2012: "The Greatest Hoax: How the Global Warming Conspiracy Threatens Your Future". (AP Photo/J. Scott Applewhite)
Senator Edward 'Ed' Markey, a Democrat from Massachusetts, from right, Senator Charles Schumer, a Democrat from New York, and Senator Al Franken, a Democrat from Minnesota, hold a news conference on Keystone XL pipeline amendments at the U.S. Capitol in Washington, D.C., U.S., on Tuesday, Jan. 20, 2015. Senate Democratic leaders will push hard for full Senate vote on an amendment to Keystone XL pipeline legislation that puts all senators on record on their views about whether carbon emissions spark climate change, said Schumer. Photographer: Andrew Harrer/Bloomberg via Getty Images
Senator Al Franken, a Democrat from Minnesota, from left, Senator Charles Schumer, a Democrat from New York, and Senator Edward 'Ed' Markey, a Democrat from Massachusetts, hold a news conference on Keystone XL pipeline amendments at the U.S. Capitol in Washington, D.C., U.S., on Tuesday, Jan. 20, 2015. Senate Democratic leaders will push hard for full Senate vote on an amendment to Keystone XL pipeline legislation that puts all senators on record on their views about whether carbon emissions spark climate change, said Schumer. Photographer: Andrew Harrer/Bloomberg via Getty Images
Kelly Kelly of Omaha waves signs with others opposing the Keystone XL oil pipeline during a demonstration outside the office of Rep. Brad Ashford, D-Neb., in Omaha, Neb., Tuesday, Jan. 13, 2015. Democrats plan to use Senate consideration of the Keystone XL oil pipeline to get Republicans on the record about climate change and to resurrect parts of a bipartisan energy efficiency bill doomed by pipeline politics last year. (AP Photo/Nati Harnik)
Demonstrators opposing the Keystone XL oil pipeline hold banners outside the office of Rep. Brad Ashford, D-Neb., in Omaha, Neb., Tuesday, Jan. 13, 2015. Democrats plan to use Senate consideration of the Keystone XL oil pipeline to get Republicans on the record about climate change and to resurrect parts of a bipartisan energy efficiency bill doomed by pipeline politics last year. (AP Photo/Nati Harnik)
A woman holds a sign that reads in Portuguese "SOS, There is only one Earth," during the People's Climate March at Ipanema beach, Rio de Janeiro, Brazil, Sunday, Sept. 21, 2014. The People's Climate March, is a worldwide mobilization calling on world leaders to commit to urgent action on climate change and 100% clean energy. (AP Photo/Silvia Izquierdo)
Dog named "Mel" stands with its owner while wearing a t-shirt with a green heart during the People's Climate March at Ipanema beach, Rio de Janeiro, Brazil, Sunday, Sept. 21, 2014. The People's Climate March, is a worldwide mobilization calling on world leaders to commit to urgent action on climate change and 100% clean energy. (AP Photo/Silvia Izquierdo)
People with green hearts painted on their faces participates the People's Climate March at Ipanema beach, Rio de Janeiro, Brazil, Sunday, Sept. 21, 2014. The People's Climate March, is a worldwide mobilization calling on world leaders to commit to urgent action on climate change and 100% clean energy. (AP Photo/Silvia Izquierdo)
A woman with a green heart painted on her face holds a flag during the People's Climate March at Ipanema beach, Rio de Janeiro, Brazil, Sunday, Sept. 21, 2014. The People's Climate March, is a worldwide mobilization calling on world leaders to commit to urgent action on climate change and 100% clean energy. (AP Photo/Silvia Izquierdo)
The Christ the Redeemer statue is lit up in green as a symbolic warning of the dangers of climate change, in Rio de Janeiro, Brazil, Thursday, Sept. 18, 2014. This event is in support of the Global People’s Climate March, scheduled for the next Sunday, which is asking for solutions to combat global climate change, in advance of the United Nations Climate Summit to be held on September 23. (AP Photo/Silvia Izquierdo)
Christ the Redeemer statue is lit up with the words that read in Portuguese "21 September, March for the Climate," in Rio de Janeiro, Brazil, Thursday, Sept.18, 2014. The statue was lit up in as a symbolic warning to the dangers of climate change. This event is in support of the Global People’s Climate March, scheduled for the next Sunday, which is asking for solutions to combat global climate change, in advance of the United Nations Climate Summit to be held on September 23. (AP Photo/Silvia Izquierdo)
The Christ the Redeemer statue is lit up in green as a symbolic warning of the dangers of climate change, in Rio de Janeiro, Brazil, Thursday, Sept. 18, 2014. This event is in support of the Global People’s Climate March, scheduled for the next Sunday, which is asking for solutions to combat global climate change, in advance of the United Nations Climate Summit to be held on September 23. (AP Photo/Silvia Izquierdo)
A gas mask is projected on the face of Christ the Redeemer statue as a symbolic warning to the dangers of climate change, in Rio de Janeiro, Brazil, Thursday, Sept. 18, 2014. This event is in support of the Global People’s Climate March, scheduled for the next Sunday, which is asking for solutions to combat global climate change, in advance of the United Nations Climate Summit to be held on September 23. (AP Photo/Silvia Izquierdo)
People cheer during the People's Climate March on Ipanema beach, in Rio de Janeiro, Brazil, Sunday, Sept. 21, 2014. The People's Climate March, is a worldwide mobilization calling on world leaders to commit to urgent action on climate change and 100% clean energy. (AP Photo/Silvia Izquierdo)
IMAGE DISTRIBUTED FOR AVAAZ - An estimated 40,000 thousand people march from the Embankment via Whitehall to the Houses of Parliament in central London on Sunday, Sept. 21, 2014 as part of the People's Climate March, a worldwide mobilisation calling on world leaders to commit to urgent action on climate change and 100% clean energy. (Fiona Hanson/AP Images for AVAAZ)
Demonstrators display placards and banners as they participate in the Peoples Climate March in London on September 21, 2014. The march was one of several demonstrations calling for action to combat climate change taking place at cities around the world. AFP PHOTO/ADRIAN DENNIS (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
A child in costume as demonstrators display placards and banners as they participate in the Peoples Climate March in London on September 21, 2014. The march was one of several demonstrations calling for action to combat climate change taking place at cities around the world. AFP PHOTO/ADRIAN DENNIS (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
IMAGE DISTRIBUTED FOR AVAAZ - An estimated 40,000 thousand people march from the Embankment via Whitehall to the Houses of Parliament in central London on Sunday, Sept. 21, 2014 as part of the People's Climate March, a worldwide mobilisation calling on world leaders to commit to urgent action on climate change and 100% clean energy. (Fiona Hanson/AP Images for AVAAZ)
IMAGE DISTRIBUTED FOR AVAAZ - From left, Designer Vivienne Westwood, musician Peter Gabriel and actress Emma Thompson join an estimated 40,000 thousand people marching from the Embankment via Whitehall to the Houses of Parliament in central on Sunday, Sept. 21, 2014 as part of the People's Climate March, a worldwide mobilisation calling on world leaders to commit to urgent action on climate change and 100% clean energy. (Fiona Hanson/AP Images for AVAAZ)
IMAGE DISTRIBUTED FOR AVAAZ - An estimated 40,000 thousand people march from the Embankment via Whitehall to the Houses of Parliament in central London on Sunday, September 21, 2014 as part of the People's Climate March, a worldwide mobilisation calling on world leaders to commit to urgent action on climate change and 100% clean energy. (Fiona Hanson/AP Images for AVAAZ)
RIO DE JANEIRO, BRAZIL - SEPTEMBER 21: A man waves a flag with a green heart during the climate march along Ipanema beach on September 21, 2014 in Rio de Janeiro, Brazil. Protests calling for curbs in greenhouse gas emissions were scheduled for today in 150 countries ahead a U.N. summit on climate change. The Amazon rainforest, mostly located in Brazil, produces about 20 percent of the earth's oxygen but is threatened by deforestation. (Photo by Mario Tama/Getty Images)
RIO DE JANEIRO, BRAZIL - SEPTEMBER 21: Participants brave inclement weather to take part in the climate march along Ipanema beach on September 21, 2014 in Rio de Janeiro, Brazil. Protests calling for curbs in greenhouse gas emissions were scheduled today in 150 countries ahead a U.N. summit on climate change. The Amazon rainforest, mostly located in Brazil, produces about 20 percent of the earth's oxygen but is threatened by deforestation. (Photo by Mario Tama/Getty Images)
RIO DE JANEIRO, BRAZIL - SEPTEMBER 21: Participants brave inclement weather to take part in the climate march along Ipanema beach on September 21, 2014 in Rio de Janeiro, Brazil. Protests calling for curbs in greenhouse gas emissions were scheduled today in 150 countries ahead a U.N. summit on climate change. The Amazon rainforest, mostly located in Brazil, produces about 20 percent of the earth's oxygen but is threatened by deforestation. (Photo by Mario Tama/Getty Images)
RIO DE JANEIRO, BRAZIL - SEPTEMBER 21: Participants chant during the climate march along Ipanema beach on September 21, 2014 in Rio de Janeiro, Brazil. Protests calling for curbs in greenhouse gas emissions were scheduled for today in 150 countries ahead a U.N. summit on climate change. The Amazon rainforest, mostly located in Brazil, produces about 20 percent of the earth's oxygen but is threatened by deforestation. (Photo by Mario Tama/Getty Images)
A climate protester wearing a Guy Fawkes mask holds a banner reading ' World leaders act!' on the Republique's square during a demonstration to fight climate change, on September 21, 2014 in Paris. AFP PHOTO / FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
Climate protesters gather on the Republique's square during a demonstration to fight climate change, on September 21, 2014 in Paris. AFP PHOTO / FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
Climate protesters hold a banner reading ' I am the change' on the Republique's square during a demonstration to fight climate change, on September 21, 2014 in Paris. AFP PHOTO / FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
Climate protesters hold a banner reading ' Let's be the change' on the Republique's square during a demonstration to fight climate change, on September 21, 2014 in Paris. AFP PHOTO / FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
Demonstrators display placards and banners as they participate in the Peoples Climate March in London on September 21, 2014. The march was one of several demonstrations calling for action to combat climate change taking place at cities around the world. AFP PHOTO/ADRIAN DENNIS (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
Enviromental protesters gather in a park in Sydney September 21, 2014 as part of a global protest on climate change. Australians rallied for climate action forming a human chain message as part of an international day of action to fight climate change ahead of a United Nations summit in New York on 23 September. AFP PHOTO/Peter PARKS (Photo credit should read PETER PARKS/AFP/Getty Images)
Enviromental protesters gather in a park in Sydney September 21, 2014 as part of a global protest on climate change. Australians rallied for climate action forming a human chain message as part of an international day of action to fight climate change ahead of a United Nations summit in New York on 23 September. AFP PHOTO/Peter PARKS (Photo credit should read PETER PARKS/AFP/Getty Images)
Enviromental protesters gather in a park in Sydney September 21, 2014 as part of a global protest on climate change. Australians rallied for climate action forming a human chain message as part of an international day of action to fight climate change ahead of a United Nations summit in New York on 23 September. AFP PHOTO/Peter PARKS (Photo credit should read PETER PARKS/AFP/Getty Images)
Enviromental protesters gather in a park in Sydney September 21, 2014 as part of a global protest on climate change. Australians rallied for climate action forming a human chain message as part of an international day of action to fight climate change ahead of a United Nations summit in New York on 23 September. AFP PHOTO/Peter PARKS (Photo credit should read PETER PARKS/AFP/Getty Images)
NEW DELHI, INDIA - SEPTEMBER 20: People participating during the Climate Change March at Mandi House to Jantar Mantar on September 20, 2014 in New Delhi, India. The march is a global movement with participation of college students, kids, other civil society allies, young professionals, rights groups, resident welfare associations and farming communities. The march is set up ahead of United Nations Summit on Climate change in New York on September 23 lead by UN Secretary General Mr. Ban Ki Moon. (Photo by Sonu Mehta/Hindustan Times via Getty Images)
NEW DELHI, INDIA - SEPTEMBER 20: People participating during the Climate Change March at Mandi House to Jantar Mantar on September 20, 2014 in New Delhi, India. The march is a global movement with participation of college students, kids, other civil society allies, young professionals, rights groups, resident welfare associations and farming communities. The march is set up ahead of United Nations Summit on Climate change in New York on September 23 lead by UN Secretary General Mr. Ban Ki Moon. (Photo by Sonu Mehta/Hindustan Times via Getty Images)
NEW DELHI, INDIA - SEPTEMBER 20: People participating during the Climate Change March at Mandi House to Jantar Mantar on September 20, 2014 in New Delhi, India. The march is a global movement with participation of college students, kids, other civil society allies, young professionals, rights groups, resident welfare associations and farming communities. The march is set up ahead of United Nations Summit on Climate change in New York on September 23 lead by UN Secretary General Mr. Ban Ki Moon. (Photo by Sonu Mehta/Hindustan Times via Getty Images)
NEW DELHI, INDIA - SEPTEMBER 20: People participating during the Climate Change March at Mandi House to Jantar Mantar on September 20, 2014 in New Delhi, India. The march is a global movement with participation of college students, kids, other civil society allies, young professionals, rights groups, resident welfare associations and farming communities. The march is set up ahead of United Nations Summit on Climate change in New York on September 23 lead by UN Secretary General Mr. Ban Ki Moon. (Photo by Sonu Mehta/Hindustan Times via Getty Images)
NEW DELHI, INDIA - SEPTEMBER 20: People participating during the Climate Change March at Mandi House to Jantar Mantar on September 20, 2014 in New Delhi, India. The march is a global movement with participation of college students, kids, other civil society allies, young professionals, rights groups, resident welfare associations and farming communities. The march is set up ahead of United Nations Summit on Climate change in New York on September 23 lead by UN Secretary General Mr. Ban Ki Moon. (Photo by Sonu Mehta/Hindustan Times via Getty Images)
NEW DELHI, INDIA - SEPTEMBER 20: People participating during the Climate Change March at Mandi House to Jantar Mantar on September 20, 2014 in New Delhi, India. The march is a global movement with participation of college students, kids, other civil society allies, young professionals, rights groups, resident welfare associations and farming communities. The march is set up ahead of United Nations Summit on Climate change in New York on September 23 lead by UN Secretary General Mr. Ban Ki Moon. (Photo by Sonu Mehta/Hindustan Times via Getty Images)
NEW DELHI, INDIA - SEPTEMBER 20: People participating during the Climate Change March at Mandi House to Jantar Mantar on September 20, 2014 in New Delhi, India. The march is a global movement with participation of college students, kids, other civil society allies, young professionals, rights groups, resident welfare associations and farming communities. The march is set up ahead of United Nations Summit on Climate change in New York on September 23 lead by UN Secretary General Mr. Ban Ki Moon. (Photo by Sonu Mehta/Hindustan Times via Getty Images)
NEW DELHI, INDIA - SEPTEMBER 20: People participating during the Climate Change March at Mandi House to Jantar Mantar on September 20, 2014 in New Delhi, India. The march is a global movement with participation of college students, kids, other civil society allies, young professionals, rights groups, resident welfare associations and farming communities. The march is set up ahead of United Nations Summit on Climate change in New York on September 23 lead by UN Secretary General Mr. Ban Ki Moon. (Photo by Sonu Mehta/Hindustan Times via Getty Images)
NEW DELHI, INDIA - SEPTEMBER 20: People participating during the Climate Change March at Mandi House to Jantar Mantar on September 20, 2014 in New Delhi, India. The march is a global movement with participation of college students, kids, other civil society allies, young professionals, rights groups, resident welfare associations and farming communities. The march is set up ahead of United Nations Summit on Climate change in New York on September 23 lead by UN Secretary General Mr. Ban Ki Moon. (Photo by Sonu Mehta/Hindustan Times via Getty Images)
ISTANBUL, TURKEY - 2014/09/20: Hundreds of people have marched in Istanbul as part of a worldwide protests demanding action on climate change. (Photo by Basin Foto Ajansi/LightRocket via Getty Images)
ISTANBUL, TURKEY - 2014/09/20: Hundreds of people have marched in Istanbul as part of a worldwide protests demanding action on climate change. (Photo by Basin Foto Ajansi/LightRocket via Getty Images)
ISTANBUL, TURKEY - 2014/09/20: Hundreds of people have marched in Istanbul as part of a worldwide protests demanding action on climate change. (Photo by Basin Foto Ajansi/LightRocket via Getty Images)
NEW DELHI, INDIA - SEPTEMBER 20: People participating during the Climate Change March at Mandi House to Jantar Mantar on September 20, 2014 in New Delhi, India. The march is a global movement with participation of college students, kids, other civil society allies, young professionals, rights groups, resident welfare associations and farming communities. The march is set up ahead of United Nations Summit on Climate change in New York on September 23 lead by UN Secretary General Mr. Ban Ki Moon. (Photo by Sonu Mehta/Hindustan Times via Getty Images)
RIO DE JANEIRO, BRAZIL - 2014/09/18: Christ the Redeemer iconic statue is lit up with symbolic warnings about the dangers of climate change, an international campaign to warn the locals about climate change that began on Thursday, September 18th. (Photo by Fabio Teixeira/Pacific Press/LightRocket via Getty Images)
RIO DE JANEIRO, BRAZIL - 2014/09/18: Christ the Redeemer iconic statue is lit up with symbolic warnings about the dangers of climate change, an international campaign to warn the locals about climate change that began on Thursday, September 18th. (Photo by Fabio Teixeira/Pacific Press/LightRocket via Getty Images)
RIO DE JANEIRO, BRAZIL - 2014/09/18: Christ the Redeemer iconic statue is lit up with symbolic warnings about the dangers of climate change, an international campaign to warn the locals about climate change that began on Thursday, September 18th. (Photo by Fabio Teixeira/Pacific Press/LightRocket via Getty Images)
Climate protesters hold banners on September 21, 2014 in Bordeaux during a demonstration to fight climate change. Green groups are staging climate marches in various cities worldwide prior to the UN Climate Summit taking place in New York on September 23. AFP PHOTO MEHDI FEDOUACH (Photo credit should read MEHDI FEDOUACH/AFP/Getty Images)
A climate protester holds a banner reading 'Don't worry, when we will run out of water, we will still have coca-cola' on September 21, 2014 in Bordeaux during a demonstration to fight climate change. Green groups are staging climate marches in various cities worldwide prior to the UN Climate Summit taking place in New York on September 23. AFP PHOTO MEHDI FEDOUACH (Photo credit should read MEHDI FEDOUACH/AFP/Getty Images)
A child holds a banner reading 'Mummy, can I go play outside ?' on September 21, 2014 in Bordeaux during a demonstration to fight climate change. Environmental groups are staging climate marches in various cities worldwide prior to the UN Climate Summit taking place in New York on September 23. AFP PHOTO MEHDI FEDOUACH (Photo credit should read MEHDI FEDOUACH/AFP/Getty Images)
Climate protesters gather on the Republique's square during a demonstration to fight climate change, on September 21, 2014 in Paris. AFP PHOTO / FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
Climate protesters hold a banner reading ' Earth is the only planet with chocolate, preserve it 'on the Republique's statue during a demonstration to fight climate change, on September 21, 2014 in Paris. AFP PHOTO / FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
A climate protester wearing a Guy Fawkes mask holds a banner reading ' World leaders act!' on the Republique's statue during a demonstration to fight climate change, on September 21, 2014 in Paris. AFP PHOTO / FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
Indian protestors take part in the People's Climate March ahead of the UN Climate Summit, to demand progress in the faltering talks, in New Delhi on September 20, 2014. Green groups are staging climate marches in various cities worldwide prior to the UN Climate Summit taking place in New York on September 23. AFP PHOTO/SAJJAD HUSSAIN (Photo credit should read SAJJAD HUSSAIN/AFP/Getty Images)
Indian protestors take part in the People's Climate March ahead of the UN Climate Summit, to demand progress in the faltering talks, in New Delhi on September 20, 2014. Green groups are staging climate marches in various cities worldwide prior to the UN Climate Summit taking place in New York on September 23. AFP PHOTO/SAJJAD HUSSAIN (Photo credit should read SAJJAD HUSSAIN/AFP/Getty Images)
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Celebrities in London including actress Emma Thompson and musician Peter Gabriel joined thousands of people crossing the capital's center, chanting: "What do we want? Clean energy. When do we want it? Now."

"This is important for every single person on the planet, which is why it has to be the greatest grass roots movement of all time," Thompson said. "This is the battle of our lives. We're fighting for our children."

In New York, a contingent came from Moore, Oklahoma, where a massive tornado killed 24 people last year, as did hundreds of people affected by Superstorm Sandy, which the U.S. National Oceanic and Atmospheric Administration and the British meteorological office said was made more likely by climate change.

In Australia, the largest rally was in Melbourne, where an estimated 10,000 people took to the streets with banners and placards calling on their government to do more to combat global warming.

Australian Prime Minister Tony Abbott was a particular target of the protesters. Abbott's center-right coalition has removed a carbon tax and has restricted funding for climate change bodies since coming to power last year.

Thousands March in NYC Over Climate Change

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