Workers clean up and check plant tags after transplanting marijuana plants to grow in a greenhouse at the Los Suenos Farms facility in Avondale, Colorado, U.S., on Thursday, Feb. 25, 2016. About 938 dispensaries, which outnumber Starbucks in Colorado, in 2015 yielded $135 million in state taxes and fees, 44 percent more than a year earlier. Yet as the market enters its third year after voters legalized retail sales in 2012, officials question whether the newfound income outweighs the escalating social costs. Photographer: Matthew Staver/Bloomberg via Getty Images
