can you rewrite these paragraphs in your own words?
a single puff of tobacco smoke contains more than 4,000 chemicals. almost all of these chemicals prevent the body from functioning the way it should. at least 43 of them cause cancer in smokers. in the united states more than 400,000 people die each year as a result of smoking-related illnesses. smoke also harms the health of nonsmokers. even smokeless tobacco causes health problems for its users.
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tobacco contains three substances that are especially harmful to health. nicotine ( nik-uh-teen) is an addictive drug found in tobacco. nicotine makes tobacco users crave even more nicotine. tar is a thick, dark liquid that forms when tobacco burns. this liquid coats the lining of the lungs and causes diseases. carbon monoxide (kar-buhn muh-nahk-syd) is a colorless, odorless, poisonous gas produced when tobacco burns. tobacco smoke from a cigarette, cigar, or pipe contain all of these substances.