Marijuana smoke not as damaging to lungs as cigarette smoke, study suggests

Marijuana smoke not as damaging to lungs as cigarette smoke, study suggests:

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Using marijuana carries legal risks, but the consequences of occasionally lighting up do not include long-term loss of lung function, according to a new study in the Jan. 11, 2012, issue of the Journal of the American Medical Association.

Marijuana is the most commonly used illicit drug in the United States, according to the National Survey on Drug Use and Health. In 2009, 16.7 million Americans ages 12 and older reported using marijuana at least once in the month prior to being surveyed. In addition, since 1996, 16 states and Washington, D.C., have legalized the medical use of marijuana to help manage the symptoms of many diseases, including cancer, AIDS and glaucoma.