What are the long term effects of smoking marijuana?

What are the long term effects of smoking marijuana? Is smoking once every three or four months really detrimental toward your health? How long does it stay detectable in your system? I'm a fairly large guy (six feet 185lbs) so how much would two dime sacks affect me (its not laced with anything im aware... show more What are the long term effects of smoking marijuana? Is smoking once every three or four months really detrimental toward your health? How long does it stay detectable in your system? I'm a fairly large guy (six feet 185lbs) so how much would two dime sacks affect me (its not laced with anything im aware of)? How could I vaporize it without a vaporizer?
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