I'm taking a botany class because...you know why. Anyway, my textbook says that "Regular use of marijuana for a year has been shown to have the same effect on human lungs as smoking one and a half packs of cigarettes a day for 13 years." Right away, I call BULLSHIT. Study Finds No Cancer-Marijuana Connection New US Study Affirms Smoked Marijuana Protects Against Cancer. | NowPublic News Coverage I'm posting this because I didn't want to tear my instructor and anyone else in school three new ones because of a single paragraph in a clearly retarded textbook. Anyone else have legit sources I could drop on people to counter their obviously anti-drug bullshit?