HAH
There is no harm to the brain what so ever, even for the tokers who toke multiple times a day everyday. Thats commonly accepted information to all sorts of nuero-scientists. Close minded and simple minded people just aren't willing to accept information and drop old incorrect facts.
Theres been recent studies where they are trying to find a relation between THC and killing cancer. Theres a connection between the groupd of tobacco smokers who dont have lung cancer. Many of them smoked marijuana frequently. THC has anti cancerous properties. THC target the blood supply of cancerous cells and kills them.
http://www.webmd.com/lung-cancer/new...to-lung-cancer
http://www.sciencedaily.com/upi/inde...-marijuana.xml
Its been known to kill brain tumors in rats since the 70s but the study was shut down cuz of Govt nonsense.
Marijuana is one of the least dangerous drugs (if you even want to call it that). If you look at any credible rating of drug hazards, you'll notice marijuana is pretty far down there. Whats on top of the list are ALCOHOL, TOBACCO, amphetamines, meth, coke, crack, heroine, etc. Im sure everyone notices more and more states allowing medical marijuana. The govt realize it dosn't harm anyone, but they just dont want to admit it quite yet after spending so much $$ on this "war on drugs". They would look like idiots.
It was made illegal in the first place because of politics.
The things we do and eat in our common day to day lives affect our physical and mental health negatively WAY more than some of these so called drugs.