Colorado Department Of Agriculture

marijuana_agriculture_24623.jpg

In this Jan. 31, 2017 photo, agriculture regulators from seven different states and Guam tour a Denver marijuana growing warehouse on a tour organized by the Colorado Department of Agriculture in Denver. The department is opening up its marijuana knowledge to other states and encouraging them to plan now for the possibility of regulating farmers growing a plant that violates federal law. (AP Photo/Kristen Wyatt)