From Patriarchy to Androgyny and Other Myths
Marijuana is a crude drug made from the cannabis sativa plant. The mind- altering, psychoactive ingredient in marijuana is THC; however there are an additional 400 other chemicals in this plant. ... Tars from marijuana smoke have produced tumors; the lungs are especially at risk because the unfiltered smoke is intentionally held in the lungs for an extended period of time. The hash substance made from the plant contains five to ten times as much THC than the crude marijuana that is smoked.