Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 28 · Episode 3 ·
Smokers Can Harm Your Health
Horizon investigates the case against passive smoking and reveals new evidence of its danger.
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Episode 3 of season 28 of Horizon: “Smokers Can Harm Your Health”. Aired 1991-01-21. Watch it online free on ZapFlix.