Nurturing cannabis: Business is booming, but growers are handicapped by shifting rules and major research gaps.

The article reports that despite cannabis being a high-value plant that can legally be grown, growers in the U.S. are still facing challenges due to the plants status as an illegal drug according to the government. Topics discussed include states including Oregon, Colorado and Maine having legalized marijuana for recreational use, and there being large gaps in scientific knowledge on how cannabis is to be safely grown. INSETS: Delving into the cannabis genome;The dirty half dozen.