DENVER
04/13/2011 01:26 pm ET Updated Jun 13, 2011

Report: Indoor Marijuana Grow Operations Contribute To Global Warming

People growing marijuana indoors use 1 percent of the U.S. electricity supply, and they create 17 million metric tons of carbon dioxide every year (not counting the smoke exhaled), according to a report by Evan Mills, an energy analyst at the Lawrence Berkeley National Laboratory

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