A leaf floats in water in Regent's Park on October 21, 2014 in London, England. Despite weather warnings issued by the Met Office for high winds and rain off the back of Hurricane Gonzalo, those predictions didn't materialise in London. (Photo by Dan Kitwood/Getty Images)
NEW YORK, NY - OCTOBER 29: An End of road sign is seen overgrown in bushes two years after Superstorm Sandy damaged much of the area on October 29, 2014 in the Graham Beach neighborhood of the Staten Island Borough of New York City. Huricane Sandy was recorded as the deadliest and most destructive hurricane of the 2012 Atlantic hurricane season. It caused over $68 billion in damages, and hundreds of people were killed along the path of the storm in seven countries. Today marks the two-year anniversary of its storm surge hitting New York City and the surrounding area which flooded streets, tunnels and subway lines and cut power in and around the city. (Photo by Andrew Burton/Getty Images)
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And if you're raking up your leaves, you are also raking up butterfly and moth pupae. Don't you want butterflies in your garden?
The post also mentions leaves make a great natural mulch and help suppress weeds.
If you do insist on keeping your yard cleaned up, the NWF recommends doing it the old-fashioned way, because leaf blowers pollute the air.
We honestly didn't need these reasons to avoid tidying up the leaves in our yards, but hey, now we can say we're doing it for the environment.