A 2011 study by researchers at the Lawrence Berkeley National Laboratory found that the marijuana industry is responsible for 1 percent of U.S. electricity use, primarily because of resources associated with indoor cultivation and storage.
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Even after new direction from the Justice Department, U.S. Attorney Melinda Haag has continued her aggressive crackdown on some of the country's largest medical marijuana dispensaries. Her members of Congress aren't happy.
These initiatives roll back local penalties for possessing less than 1, or less than 2.5 ounces of marijuana (depending on location), regardless of whether it is for medical or recreational use. But they leave residents vulnerable to not just federal prohibition, but existing state laws,