If you haven’t seen marijuana in the news lately then you haven’t been paying attention. This week lawmakers in Maryland, Maine, Massachusetts, Colorado, Washington, Kentucky, and Georgia are all talking about weed. Some doctors are using the drug to treat epilepsy, multiple sclerosis, and chronic pain. Journalists are finding stories of marijuana lobbyists and marijuana job fairs and multi-day cannabis tours.

Most of these news stories mention that little is known about the long-term effects of marijuana use. But I bet the average Joe is much more likely to make jokes about weed than fret about its potential harms. I was in the