Smoking, drinking and drug abuse decline among U.S. teens, who prefer pot and vaping, study finds
(LA Times Europe)

Nearly 1 in 3 high school seniors say they used a vaping device in the past year. Use of pot remained stable, but fewer teens disapprove of regular marijuana use and daily use is more popular than daily tobacco smoking. Abuse of opioid painkillers is down, partly because they are harder to get.