actually, about the marijuana, I read in "The Week" that marijuana actually grows brain cells. Heres part of the article:
"The Rastafarians may have a point. Marijuana really is a mind-expanding drug, with the capacity to stimulate the brain to grow new cells, a new study has found...Head researcher Xia Zhang injected rats with a synthetic cannabinoid (the kind of drug marijuana is) for 10 days. A month later, Zhang tested the rats for indications of depression, and monitored brain changes. The rats that had been injected with the synthetic marijuana exhibited better moods, and had visible increase in cells in the hippocampus - a region of the brain that's involved with emotions. "