A woman exhales marijuana smoke during the annual 420 pot rally on Parliament Hill in Ottawa, Canada, on April 20, 2016. Justin Tang The Associated Press
A woman exhales marijuana smoke during the annual 420 pot rally on Parliament Hill in Ottawa, Canada, on April 20, 2016. Justin Tang The Associated Press

Secondhand pot smoke can give you more than just a contact high

April 23, 2016 1:41 PM