Excuse me while I kiss the sky. More good news for pot heads. A new study concludes that smoking marijuana does not pose a major cancer risk. Yes, both pot and tobacco are packed with cancer causing chemicals, but other qualities of marijuana seem to keep it from promoting lung cancer, according to a new report. Making it sound almost too good to be true -- "THC acts in ways that counter the cancer-causing chemicals in marijuana smoke" -- this evidence will surely serve to galvanize the anti-pot troops once again. Flying in the face of all rationality and statistical evidence, they persist in opposing any efforts to lighten up (ha! ha!). Why should that be surprising? They don't believe in evolution either.