Study: Teens who regularly use pot may see long-term IQ decline

Study: Teens who regularly use pot may see long-term IQ decline: "For some, it's a legal issue," he said, "but for me, it's a health issue." Marijuana use is illegal in New Zealand. Pot smoking is relatively common in U.S. teens. The government reported in June that 23 per cent of older teen students said they'd ...