‘Non-Smoking’ Doesn’t Mean Smoke-Free“禁煙”不等于“無煙”

Despite decades of indoor smoking bans and restrictions， new research from Drexel University suggests the toxins we’ve been trying to keep out are still finding their way into the air inside. Findings by a group of environmental engineers show that third-hand smoke， the chemical residue from cigarette smoke that attaches to anything and anyone in the vicinity of a smoke cloud， can make its way into the air and circulate through buildings where no one is smoking.

室內(nèi)吸煙禁限令已實(shí)施數(shù)十年。（剩余8448字）