Edufer, You're not being consistent. Just as there is likely to be a level of consumption of alcohol where there are essentially no harmful effects the same goes for smoking herb. Moderation is important. I've never heard of beer being beneficial, only wine and it was because of the grapes and the same effect can be gotten from grape juice. Alcohol is MUCH more addictive than marijuana when consumed regularly and in my experience is a much more unhealthy drug. You can argue society's biases, but they are not rationally grounded. While I lack the figures, I would be willing to bet that the number of people killed by cancer from smoking pot is less than the number of people killed by drunk drivers every year. In those cases it's not even the people who do the drinking that suffer. Yet herb is illegal and alcohol isn't. My main point was simply that our society seems to accept behaviors which cover all the bad sides of recreational drug use. This is not to say that it is good or necessary to use them, but it should be a choice. Regarding strictly the health effects, marijuana is only clearly unhealthy because of the smoke. If you only ate brownies it isn't clear it would be unhealthy. Most of the transformation occurs during burning, generating carbon based carcinogens (also present in smoked meat, which can cause stomach cancer). Name one thing transformed in the brain that clearly has bad effects. Thermodynamics are ridiculous to simply through it out there labeled as inarguable. It isn't even clearly intelligible what you mean by it. I'm sorry to hear about your father (my father had it as well and was lucky enough to live). How exactly though is prostate cancer not like prostate cancer?