marijuana marijuana

Public safety experts and advocates disagree about what conclusions can be drawn from data on the presence of alcohol or other drugs in the bodies of people involved in deadly crashes. juefraphoto/Getty Images/iStockphoto hide caption

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Courts in Kansas City, Mo., can impose a maximum fine of $25 for possession of up to 35 grams of marijuana, after voters embraced a ballot initiative Tuesday. Here, three grams of marijuana is displayed. Oliver Contreras/For The Washington Post via Getty Images hide caption

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Oliver Contreras/For The Washington Post via Getty Images

For three years recreational pot has been legal in Colorado, but using it in public is still against the law. That will change this summer when pot cafes are slated to open. Brennan Linsley/AP hide caption

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Brennan Linsley/AP

As Colorado Gets Ready To Allow Pot Clubs, Indoor Smoking Still An Issue

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Can Sobriety Tests Weed Out Drivers Who've Smoked Too Much Weed?

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The highly rated variety of medical marijuana known as "Blue Dream" was displayed among other strains at a cannabis farmers market in Los Angeles in 2014. Frederic J. Brown/AFP/Getty Images hide caption

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Marijuana's Health Effects? Top Scientists Weigh In

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Researchers have found marijuana metabolites in the urine of babies who were exposed to adult marijuana use. deux/Corbis/Getty Images hide caption

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Doctors Say Parents Shouldn't Smoke Pot Around Kids

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Marijuana is now legal for recreational or medicinal use in more than half the country, but it's still banned in professional sports. Jack Guez/AFP/Getty Images hide caption

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Jack Guez/AFP/Getty Images

NFL Players Searching For Painkiller Choices Hope For Relaxed Marijuana Ban

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Alabama Sen. Jeff Sessions at Trump Tower in New York City on Thursday. Many in the multibillion-dollar marijuana industry fear what his nomination for attorney general would spell for business. Drew Angerer/Getty Images hide caption

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A marijuana plant is displayed during the 2016 Cannabis Business Summit & Expo on Jun. 22 in Oakland, Calif. Justin Sullivan/Getty Images hide caption

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City Of Oakland Considers Ways To Share In Pot Profits

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Marijuana grows in the home of two medical marijuana patients in Medford, Ore. Jeff Barnard/AP hide caption

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Jeff Barnard/AP

How The 'Cannabis Catch-22' Keeps Marijuana Classified As A Harmful Drug

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Diego, a tortoise of the endangered Chelonoidis hoodensis subspecies from Española Island, is seen in a breeding centre at the Galapagos National Park on Santa Cruz Island. RODRIGO BUENDIA/AFP/Getty Images hide caption

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RODRIGO BUENDIA/AFP/Getty Images

High Schools In Texas Spend Big Bucks On Football Stadiums

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Since marijuana doesn't benefit mother or baby it should be avoided, researchers say. But there is stronger evidence for the harms of alcohol and tobacco. Roy Morsch/Getty Images hide caption

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Abby McLean of Northglenn, Colo., stands near the stretch of U.S. 85 in Adams County where she was pulled over for a DUI check in September 2014. Nathaniel Minor/CPR News hide caption

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Nathaniel Minor/CPR News

The Difficulty Of Enforcing Laws Against Driving While High

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The first-place Sativa variety cannabis plant at the Oregon State Fair in Salem. Deena Prichep for NPR hide caption

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Deena Prichep for NPR

Cannabis Growers Seek Blue Ribbons For Their Buds At Oregon's State Fair

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