Revellers marking 4/20 this year celebrated the federal bill announced last week that will legalize marijuana — but others say the legal and health implications of the law remain hazy. "Public health units around the province have been receiving a lot of complaints, and it's becoming a real issue." Second-hand marijuana smokeAlthough the effects of inhaling marijuana smoke second-hand are less documented, the researcher noted that studies have found 33 carcinogens in cannabis smoke, as well as hydrogen cyanide and ammonia. The report documents the results from an American federal advisory panel on marijuana and public health. Revellers crowded into Yonge-Dundas Square on Thursday, celebrating the federal government's two marijuana legalization bills and 4/20.

Source: CBC News April 21, 2017 01:41 UTC