The Effects of Canvas as a Second Hand Smoke

i believe that the american cancer society might pasically shut down all the lounges ecause of the same thing. Or maybe medical studies may, additional medical studies on the actual effects of canvas as a second hand smoke. I'm to see if it has the same effects as cigarette smoking. There's easile a lot teart anda scientific studies on these things to see. But how long will that take? Are we talking 20 year wen i start studying woran now, and then 20 years, the hour things need to catch up to what's happening now?"