Dear members,
“Second-hand smoke has over 4,000 chemicals; many of them cause cancer. Two thirds of the smoke from a cigarette is not inhaled by the smoker, but enters the air around the smoker.
Canadian Lung Association (2008) Second Hand Smoke. Retrieved on May 7, 2009 from, http://www.lung.ca/protect-protegez/tobacco-tabagisme/second-secondaire/index_e.php
