According to the National Survey on Drug Use and Health, in 2013 almost 20 million Americans used marijuana and experts expect this number to increase now that Colorado and Washington have legalized recreational as well as medical marijuana. Through objective discussion, numerous direct quotes, and full-color illustrations this title examines What are the Origins of the Marijuana Controversy? Do People With Illnesses Benefit From Marijuana? How Would Legalization of Recreational Marijuana Affect Society? How Serious Is the Conflict Between State and Federal Marijuana Laws? How Should Marijuana Be Regulated?