You thought your pot came from environmentally conscious hippies? Think again. The way marijuana is grown in America, it turns out, is anything but sustainable and organic. Check out these mind-blowing stats, and while you're at it, read Josh Harkinson's feature story, "The Landscape-Scarring, Energy-Sucking, Wildlife-Killing Reality of Pot Farming."
Sources: Jon Gettman (2006), US Forest Service (California outdoor grow stats include small portions of Oregon and Nevada), Office of National Drug Control Policy, SF Public Utilities Commission, Evan Mills (2012).
UPDATE: Beau Kilmer of the RAND Drug Policy Research Center argues that the government estimates of domestic marijuana production used in this piece and many others are in fact too high. Kilmer's research, published last week, suggests that total US marijuana consumption in 2010 (including pot from Mexico) was somewhere between 9.2 and 18.5 million pounds.