USA TODAY: Marijuana poses more risks than many realize

From USA TODAY

Marijuana poses more risks than many realize

Doctors say they’re increasingly fielding questions about the safety of marijuana, as use of the drug rises and more communities consider legalizing it. Colorado and Washington state have legalized recreational marijuana, and medical use is allowed in 21 states and Washington, D.C. USA TODAY’s Liz Szabo talked to experts about what scientists know and don’t know about marijuana’s risks and benefits. Q. How common is marijuana use? A. About 12% of people of Americans over age 12 have used it in the past year, according to the Substance Abuse and Mental Health Services Administration.Use of marijuana among high school students has been increasing since the 1990s. If current trends continue, marijuana use among high school seniors could soon become more common than cigarette smoking, says Nora Volkow, director of the National Institute on Drug Abuse.

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