This comes under the heading of “No Sh*t, Sherlock”. Doesn’t matter how much the pro-legalization crowd wants to argue, brain scans have proved there is damage to the brain with long-term use of marijuana.
“Of the total number of deaths and diseases caused by alcohol, most happen to the majority of the population who are moderate drinkers, rather than the heavy drinker minority.”
http://en.wikipedia.org/wiki/Long-term_effects_of_alcohol