Calif regulators find pot smoke causes cancer

(AP) -- Marijuana smoke has joined tobacco smoke and hundreds of other chemicals on a list of substances California regulators say cause cancer.

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<p><a href="http://www.physorg.com/news164687602.html">Calif regulators find pot smoke causes cancer</a></p> <p>(AP) -- Marijuana smoke has joined tobacco smoke and hundreds of other chemicals on a list of substances California regulators say cause cancer.</p>