Workers prune marijuana plants at a Clever Leaves greenhouse in Pesca, Colombia. The company employs over 450 people. Courtesy of Clever Leaves hide caption
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marijuana
Saturday
Thursday
University of Pittsburgh researchers developed a prototype device that can measure the amount of THC in a person's breath. Courtesy of the University of Pittsburgh hide caption
Scientists Unveil Weed Breathalyzer, Launching Debate Over Next Steps
Thursday
Marijuana use is risky for teens and pregnant women and can be habit-forming, says the U.S. surgeon general. Jane Khomi/Getty Images hide caption
Surgeon General Sounds Alarm On Risk Of Marijuana Addiction And Harm
Monday
U.S. officers found nearly four tons of marijuana in a shipment of peppers in San Diego. U.S. Customs and Border Protection hide caption
Friday
A Court of Appeals ruled that "the odor of marijuana coupled with possession of what is clearly less than ten grams ... does not grant officers probable cause" to search and arrest a person. Gerald Herbert/AP hide caption
Friday
Cannabidiol, or CBD, is a compound that can be extracted from marijuana or from hemp. It doesn't get people high because it doesn't contain THC, the psychoactive component of the cannabis plant. Getty Images hide caption
Wednesday
Studies have shown that the levels of THC, the main psychoactive compound in pot, rose dramatically in the U.S. from 1995 to 2017. David McNew/Getty Images hide caption
Highly Potent Weed Has Swept The Market, Raising Concerns About Health Risks
Thursday
A bipartisan group of attorneys general is urging Congress to pass legislation that would make it easier for banks to handle money involved in the legal cannabis industry. Brennan Linsley/AP hide caption
Wednesday
Cannabis: The Illegalization of Weed in America, by Box Brown First Second hide caption
Tuesday
Research shows a link between marijuana use and psychosis. Kirill Vasikev/EyeEm/Getty Images hide caption
Saturday
Marijuana plants grow in a marijuana cultivation facility on July 6, 2017 in Las Vegas, Nevada. Ethan Miller/Getty Images hide caption
Tuesday
A vendor points to a selection of cannabis strains for sale during a 2018 marijuana festival in California. Richard Vogel/AP hide caption
Sunday
Baltimore State's Attorney Marilyn Mosby walks through a city neighborhood on August 24, 2016. Larry French/Getty Images hide caption
Baltimore State's Attorney Will No Longer Prosecute Marijuana Possession Cases
Tuesday
The rain didn't stop customers from lining up outside Cultivate in Leicester, Mass., on Tuesday — the first day that sales of recreational marijuana became legal in the state. Steven Senne/AP hide caption
Wednesday
A soldier carries marijuana plants to be destroyed after a large plantation was seized in Hostotipaquillo, Mexico, in 2012. A new bill in Mexico's Congress would legalize pot, and with its authors' party in the majority, it is likely to pass. Bruno Gonzalez/AP hide caption