There are plenty of predictions about how cannabis farming is poised to go corporate, but Big Marijuana is not inevitable, says Ryan Stoa, a professor of law at Concordia University. That doesn’t mean it won’t happen. But Stoa, the author of Craft Weed: Family Farming and the Future of the Marijuana Industry, argues that in a world where cannabis is legal, there is a route for cannabis agriculture to stay sustainable and local. The Verge spoke to Stoa about what’s fending off a corporate takeover, potential legal regulations that could help the industry remain small, and the environmental impact of farming. (See also: Can artisanal weed compete with ‘Big Marijuana’?)