In 2022, medical marijuana is legal in 37 states and recreational marijuana is legal in 18, yet the drug remains illegal at the federal level. Public opinion on marijuana has changed substantially in the last 20 years, and today many young people view the drug as benign or even beneficial. But how exactly does marijuana affect the body and mind, and what are the potential risks of abuse or addiction?

Books in Greenwood's Q&A Health Guides series follow a reader-friendly question-and-answer format that anticipates readers' needs and concerns. Prevalent myths and misconceptions are identified and dispelled, and a collection of case studies illustrate key concepts and issues through relatable stories and insightful recommendations. Each book also includes a section on health literacy, equipping teens and young adults with practical tools and strategies for finding, evaluating, and using credible sources of health information both on and off the internet--important skills that contribute to a lifetime of healthy decision-making.