(NEW YORK TIMES) — A large new government study has found that smoking marijuana on a regular basis, even over many years, does not impair lung function.

Marijuana, the country’s most widely used illicit drug, has become increasingly popular and less stigmatized in recent years, particularly among young adults. One government report released in December found that one out of 15 high school students now smokes marijuana nearly every day, a growth fueled in part by the spread of medicinal marijuana, which is legal in 16 states. With its use rising, questions about the drug’s long-term medical consequences have garnered more attention.

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