Marijuana grow room, Tim Cullen, Colorado Harvest Company
FILE--In this Wednesday, Oct. 11, 2017, file photograph, a worker waters marijuana plants at the Colorado Harvest Company in Denver. A state-sponsored study released Thursday, Aug. 2, 2018, shows that Colorado's marijuana industry is growing less than half the plants permitted by state regulators but still meeting the demands of customers four years after sales commenced. (AP Photo/David Zalubowski, File)
