Drugs like heroin and cocain should remain illegal. Marijuana should be decriminalized. Heroin is a very dangerous and addictive drug, as is cocaine.
As far as marijuana damaging the lungs, the same can be said for cigarettes, yet they are legal. No scientific evidence has been presented that would say that marijuana does any sort of damage to the brain.
For a different spin on the government's own research, go to
www.drugwarfacts.org