Andrea Sobel stands behind a display of an array of marijuana at the Terrapin Dispensary.

Andrea Sobel has been working in the medical marijuana industry for six months and is in the process of getting her own medical marijuana license to treat her depression. Combined with exercise, she claims that marijuana is the best anti-depressant that she has tried, including various combinations of prescription medication and therapy. Sobel, 22, works at the Terrapin dispensary in Boulder, Colo.