what chemicals in cigarettes cause cancer How Do Cancer? How does smoking cause cancer?
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The best way to disentangle these discrepancies was to perform a meta-analysis

Nicotine is the main addictive chemical found in tobacco smoke, coming from the plant itself

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The tobacco people have to be aware of the fact that escalation of print advertising is a very dangerous game for them, since a marked rise in cigarette ads in publications would almost certainly provoke action by the Federal Trade Commission to require the inclusion of a health warning in those ads published after the new deadline, and such a requirement is what the tobacco industry dreads most
