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Republican Governor Phil Scott announced Wednesday he would veto the Vermont legislature's bill to legalize recreational marijuana. Above, the governor waves to supporters on election night in November. Andover/AP hide caption

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Andover/AP

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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juefraphoto/Getty Images/iStockphoto

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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Frederic J. Brown/AFP/Getty Images

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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Drew Angerer/Getty Images

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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Justin Sullivan/Getty Images

City Of Oakland Considers Ways To Share In Pot Profits

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