how many people smoke cigarettes in us Chart: Who's Smoking the U.S.? Raising Smoking Age to 100

But it also depends on how much you were exposed to second hand smoking

Thirdhand smoke consists of the tobacco residue from cigarettes, cigars, and other tobacco products that is left behind after smoking and builds up on surfaces and furnishings

Heat: Temperature affects which chemicals stay in gas form and which stick

If you didn't smoke much of it and wish to save it for later, don't stub it out

Since 1996, many more studies have been done looking at an association between passive smoke and breast cancer

Secondhand smoke increases the risk of stroke by an estimated 20% to 30% and causes more than 8,000 deaths by stroke each year