Why Tobacco Causes Cancer?
Tobacco causes cancers becasue of the chemicals it contains.
The Dangers of Second Hand Smoking
What is it? Secondhand smoke (also known as environmental tobacco smoke) is the smoke a smoker breathes out and that comes from the tip of burning cigarettes, pipes, and cigars. It contains about 4,000 chemicals. Many of these chemicals are dangerous; more than 50 are known to cause cancer. Anytime children breathe in secondhand smoke…