Pediatricians step up warnings about marijuana use by teens

An influential doctors group is beefing up warnings about marijuana’s potential harm for teens amid increasingly lax laws and attitudes on pot use.Many parents use the drug and think it’s OK for their kids, but “we would rather not mess around with the developing brain,” said Dr. Seth Ammerman.The advice comes in a new report from the American Academy of Pediatrics, published Monday in Pediatrics. The group opposes medical and recreational marijuana use for kids. It says