Gato_Solo
Out-freaking-standing OTC member
SAN FRANCISCO — Marijuana smoke has joined tobacco smoke and hundreds of other chemicals on a list of substances California regulators say cause cancer.
The ruling Friday by the Office of Environmental Health Hazard Assessment likely will force pot shops with 10 or more employees to post warnings. Final guidelines are expected by the time warning requirements take effect in a year.
Guess they'll have to ban that, too...oops. Too late.

Associated Press...
And just so you know its from more than one source...
Researchers at the University of Leicester in England have found "convincing evidence" that pot smoke damages DNA in ways that could potentially increase the risk of cancer.
"There have been many studies on the toxicity of tobacco smoke,” researcher Rajinder Singh said in a news release. “Cannabis in contrast has not been so well studied."
Singh said cannabis smoke contains 400 compounds including 60 cannabinoids. It also contains 50 percent more carcinogenic polycyclic aromatic hydrocarbons including naphthalene, benzanthracene, and benzopyrene, than tobacco smoke, Singh added.