Coming from one of the Drug Fact handouts i've gotten in Health class...

Marijuana (Hash , hash oil)
Respiratory prob. (much faster than cig.) High tar, High heat,
More cancer causing chemicals, no filter.
Fat-Soluble-Stored in brain and reproductive organs.
Affects sperm & causes more chromosome breaks.
Laziness with goals set aside. Mental burnout.
THC = Psychoactive (mind altering) ingredient.