AdvertisementAmerica's Synthetic Marijuana Overdose Crisis, ExplainedJuly 27, 2018Marisa PeñalozafacebookEmailLast month, more than 300 people overdosed on tainted synthetic marijuana in Washington, D.C. in a two-week period. Overdoes associated with the drug known as K2 have occurred in neighborhoods across the district including H Street. (Eslah Attar/NPR)