It's not good if you have a genetic predisposition to a mental disorder search it up. But you don't know until you try it. Have you ever heard people say he became crazy once he started smoking weed. I don't know about halaal though buddyWho tf is turning retarded because of loud
As for lungs thats only if you smoke too much because loghting up a small spliff like once or twice a week wont have much of an effect on your lungs.
Weed is something natural and halal also no one dies from it so theres more good than bad to it if you use it responsibly
Anyways I'm not the cannabis connoisseur, you are. 
