Illicit drug use runs in cycles, and right now young adults are favoring marijuana over opioids or amphetamines. But they're still indulging a lot less than people in the baby boom generation.
A review of studies on the effects of using marijuana while pregnant found no harms to newborns. But other studies have found an increased risk of thinking problems and ADHD in older children.
Five states will vote on legalizing recreational marijuana in November. For police, it's more challenging to assess if people are driving while high than it is to test for the influence of alcohol.
This year, Oregon's legislature designated marijuana, which is legal there for recreational use, as a farm crop. It debuted among funnel cakes, livestock and zucchini this summer at the State Fair.
An initiative has officially obtained enough signatures to be placed on November's ballot. It would allow adults to possess up to an ounce of marijuana and grow up to six plants for recreational use.
The two states, Nebraska and Oklahoma, began legal proceedings months after Colorado began allowing marijuana dispensaries to start selling pot for recreational use at the start of 2014.
Tourists who indulge in legal marijuana in Colorado are more likely to end up in the emergency room with cannabis-related problems than are state residents, a study finds. Talk about a bad trip.