Higher education: Colleges add cannabis to the curriculum

Grace DeNoya is used to getting snickers when people learn she's majoring in marijuana.

"My friends make good-natured jokes about getting a degree in weed," said DeNoya, one of the first students in a new four-year degree program in medicinal plant chemistry at Northern Michigan University. "I say, 'No, it's a serious degree, a chemistry degree first and foremost. It's hard work. Organic chemistry is a bear.'"

As a green gold rush in legal marijuana and its non-drug cousin hemp spreads across North America, a growing number of colleges are adding cannabis to the curriculum to prepare graduates for careers cultivating, researching, analyzing and marketing the herb.