Markass, one of the threads above was deleted, so you can't see that "that stuff" in my thread above wasn't a reference to cannabis. It was a reference to two other substances that are far more damaging.

Here are some links about the increased heart-attack risk:
http://www.researchmatters.harvard.e...article_id=123
http://www.abc.net.au/science/news/stories/s107589.htm
http://news.bbc.co.uk/2/hi/health/664296.stm

And here's a good one about the fact that, even though weed contains more carcinogenic chemicals than tobacco, it isn't associated with an increased risk of lung cancer. They think that's because the THC has a cancer-inhibitive effct. (We already know that it seems to have that same inhibitive effect on certain types of cancerous nerve cells in the brain.)
http://www.washingtonpost.com/wp-dyn...501729_pf.html