Smoking near babies has same effects as smoking while pregnant

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It's common knowledge that smoking near toddlers is bad, but it may be even worse than you think.

A Canadian study reveals that kids who were exposed to smoke early in childhood presented a wider body structure with a higher body mass index than other children.

SEE ALSO: Baby simulators aren't preventing teen pregnancy

The results are the same for babies of mothers who smoked during their pregnancy.

Researchers say the results may actually be underestimated because of parents who underreport the amount they smoke out of shame.

40% of children around the world are exposed to secondhand smoke in their homes.

Click through the gallery to see e-cigarettes being used in schools:

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Jonathan Brower is the owner of Waldo Vapes in Kansas City, Mo., which sells some high-end vaping products. (David Pulliam/Kansas City Star/TNS via Getty Images)
SAN RAFAEL, CA - JANUARY 28: A customer smokes an E-Cigarette at Digita Ciggz on January 28, 2015 in San Rafael, California. The California Department of Public Health released a report today that calls E-Cigarettes a health threat and suggests that they should be regulated like regular cigarettes and tobacco products. (Photo by Justin Sullivan/Getty Images)
SAN RAFAEL, CA - JANUARY 28: Rhiannon Griffith-Bowman smokes an E-Cigarette at Digital Ciggz on January 28, 2015 in San Rafael, California. The California Department of Public Health released a report today that calls E-Cigarettes a health threat and suggests that they should be regulated like regular cigarettes and tobacco products. (Photo by Justin Sullivan/Getty Images)
SAN RAFAEL, CA - JANUARY 28: A customer smokes an E-Cigarette at Digita Ciggz on January 28, 2015 in San Rafael, California. The California Department of Public Health released a report today that calls E-Cigarettes a health threat and suggests that they should be regulated like regular cigarettes and tobacco products. (Photo by Justin Sullivan/Getty Images)
SAN RAFAEL, CA - JANUARY 28: A customer smokes an E-Cigarette at Digital Ciggz on January 28, 2015 in San Rafael, California. The California Department of Public Health released a report today that calls E-Cigarettes a health threat and suggests that they should be regulated like regular cigarettes and tobacco products. (Photo by Justin Sullivan/Getty Images)
SAN RAFAEL, CA - JANUARY 28: E-Cigarette vaporizer components are displayed at Digital Ciggz on January 28, 2015 in San Rafael, California. The California Department of Public Health released a report today that calls E-Cigarettes a health threat and suggests that they should be regulated like regular cigarettes and tobacco products. (Photo by Justin Sullivan/Getty Images)
TORONTO, ON - NOVEMBER 24: The Ontario government announces new prohibitions on smoking E-Cigarettes any place real cigarettes are banned. (David Cooper/Toronto Star via Getty Images)
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