Native American tribes want to begin growing and selling marijuana. They hope it will help end poverty on reservations, the large areas where many Native Americans live. However, there is uncertainty about the future of US marijuana policy. Cannabis is the plant that produces marijuana. The growth and sale of marijuana in some states has become a big business. Arcview is a cannabis investor network in California. It says the U.S. marijuana market earned $6.7 billion in 2016. Supporters of cannabis say it has many uses. The male cannabis plant can be used to make hemp, which is used around the world in more than 25,000 products. These include food, fabric and medicine.