In Pictures: Facts about marijuana and the new laws
Marijuana facts
Credit: Getty Images
Long-term marijuana abuse can lead to addiction; that is, compulsive drug seeking and abuse despite the known harmful effects upon functioning in the context of family, school, work, and recreational activities. Estimates from research suggest that about 9 percent of users become addicted to marijuana; this number increases among those who start young (to about 17 percent) and among daily users (25-50 percent). (Source: National Institute on Drug Abuse)
Other Slideshows
Photos: Severe storms slam St. Louis area
Photos: Business district severely damaged in Mt. Olive
Photos: Dozens killed in mile-wide Oklahoma tornado
Photos: Oklahoma tornado damage
Photos: Boeing's 787 Dreamliner resumes flights
Photos: The 25 most trusted celebrities
