"It's very different," Mr. Sabet said. "We don't smoke opium to get the effects of morphine."
DEA to decide within months whether to change federal status of marijuana →
"It's really a bad message to young people that marijuana is harmless," Sabet said, "especially at a time when the marijuana kids are using is 5 to 10 times as strong as the marijuana their parents used."
MTV Video Music Awards criticized for glorifying marijuana →