When Jenna Sauter's youngest son, Axel, tested positive for THC — marijuana's active ingredient — after he was born, she got a home visit from local social services. Sauter says she and her friends don't smoke near their children. Sarah Varney/Kaiser Health News hide caption
One 8.5-oz. serving of THC-laced beverage (left) alongside three ounces of dried marijuana (right). Miles Bryan/Wyoming Public Media hide caption
Sheriff's deputies in York County, Neb., arrested an elderly California couple who had approximately 60 pounds of marijuana in their vehicle. York County Sheriff's Department hide caption
Teens' use of vape devices is increasing, and they're not always aware if nicotine is in the mix. Jane Khomi/Getty Images hide caption
Chalfonte LeNee Queen of San Diego grappled with violent vomiting episodes for 17 years until she found out her illness was related to her marijuana use. Pauline Bartolone/California Healthline hide caption
Kids who saw an ad for legal marijuana were more likely to report smoking it one year later, according to a Rand Corp. report. Tomas Rodriguez/Getty Images hide caption
In every group the researchers studied, the more marijuana people smoked the more sex they reported having. Katarina Sundelin/PhotoAlto/Getty Images hide caption
Although consuming cannabis is legal in Colorado and several other states, driving while under the influence of the drug is not. Nick Pedersen/Getty Images hide caption
Proponents of the emerging pot-for-pleasure industry want to grab a share of the nearly $2 billion tourism business in Sonoma County with events like dinners that incorporate marijuana. Courtesy of Sonoma Cannabis Company/Kristen Jeanne hide caption
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
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
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
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