Marijuana represents a significant part of substance use in America and adversely affects the health of millions of Americans. According to a recent report issued by the National Institute of Drug Abuse, Marijuana is the most commonly used ilicit drug in the United States. Its widespread use and abuse, particularly by young people under the age of eighteen, is steadily increasing while scientific evidence clearly links its long term damaging effects on brain development. For full statement click here. For statement in Spanish click here.