Alcohol is a neurotoxin, that damages every organ in the human body, is physically addictive, and has a low LD50. As DEA Administrative Judge Francis Young determined, marijuana is the least toxic substance know. Less so than potato skins and alcohol, according to a DEA judge. The AMA just released a 20 year long term study of over 5,000 marijuana smokers, the largest and best study ever done. They found NO damage to lung function. At all. 125 million marijuana smokers in the US, do you know ONE that has been found ill as a result? You could at least try reading the research before spreading discredited "facts".