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並前往https://www.quebec.ca/en/health/advice-and-prevention/healthy-lifestyle-habits/smoke-free-lifestyle/the-effects-of-smoking-and-second-hand-smoke-on-health

The Effects of Smoking and Second-Hand Smoke on Health

Effects of Smoking. Cigarette smoke contains over 7,000 chemical substances, 69 of which are known carcinogens. Inhaled smoke circulates in the ...

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