Countries around the world, including North Korea have legalised marijuana for medical and or recreational use. It's a 9 billion dollar global industry. In the United States, the industry is booming.
Emily Dufton is an historian who looks at both sides, marijuana activists and the fight to halt legalisation in her book Grass Roots: The Rise and Fall and Rise of Marijuana in America.
Emily Dufton, author of Grass Roots Photo: Twitter
