A Mississippi senator holds a bag of hemp product used by Sen. Kevin Blackwell, R-Southaven to illustrate to lawmakers what specific portions of the Mississippi Medical Cannabis Equivalency Units would look like in January. Rogelio V. Solis/AP hide caption
Delta-8-THC is derived from the cannabidiol (CBD) in hemp plants. Gillian Flaccus/AP hide caption
U.S. Rep. Dave Joyce, R-Ohio, is co-sponsoring a GOP plan that would regulate marijuana like alcohol and enable the Department of Veterans Affairs to prescribe cannabis treatments to veterans. Mark Duncan/AP hide caption
Washington is offering free, pre-rolled joints to adults who get the COVID-19 vaccine. Here, a person smokes a joint in The Netherlands. Robin Van Lonkhuijsen/AFP via Getty Images hide caption
More than 30 states have medical marijuana programs — yet scientists are only allowed to use cannabis plants from one U.S. source for their research. That's set to change, as the federal government begins to add more growers to the mix. Drew Angerer/Getty Images hide caption
Photo released by the City of London Police showing the first "cannabis factory" discovered in the City. City of London Police hide caption
A worker picks Cannabis inside a greenhouse on Nov. 10, in Kasese, Uganda. Uganda is one of several African countries looking to produce medical cannabis for export to Europe and America. On Wednesday, the U.N. Commission on Narcotic Drugs voted to reclassify cannabis. Luke Dray/Getty Images hide caption
Cans of Pabst Blue Ribbon cannabis-infused lemon seltzer are non-alcoholic, with 5mg of THC. A four-pack costs $24. Pabst Labs hide caption
Louisiana, like many other states where cannabis is legal, has designated the cannabis industry as essential. Above, marijuana plants grow under special lights at GB Sciences Louisiana, in Baton Rouge. Gerald Herbert/AP hide caption
Los Angeles District Attorney Jackie Lacey announced she has asked a judge to wipe out and seal cannabis-related convictions dating back to 1956. It's the culmination of a partnership with the nonprofit group Code for America which used computer-based algorithms to identify eligible cases. Marcio Jose Sanchez/AP hide caption
A flyer reminding customers about vaping-related deaths and illnesses, on display in a Seattle vape store. The Washington State Board of Health recently passed a four-month emergency ban on flavored vaping products. It applies to products that contain either THC or nicotine. Jovelle Tamayo/Bloomberg/Getty Images hide caption
Vaping illness is a growing concern, according to the Centers for Disease Control and Prevention. The agency's principal deputy director, Dr. Anne Schuchat, announced new numbers Thursday. Andrew Harnik/AP hide caption
Investigators have found that cannabis-containing vaping products are linked with many of the reported cases of vaping-related lung illness. Mike Wren/AP hide caption
Workers prune marijuana plants at a Clever Leaves greenhouse in Pesca, Colombia. The company employs over 450 people. Courtesy of Clever Leaves hide caption
U.S. health officials are again urging people to stop vaping until experts figure out why some are coming down with serious respiratory illnesses. Richard Vogel/AP hide caption