Friday, September 2, 2011

Marijuana: High on Megawatts

When it comes to wasting megawatts, marijuana is the greatest offender. According to a 2011 study of indoor pot-growing operations, growers in the United States use about $5 billion worth of electricity to power lightbulbs, ventilation fans, dehumidifiers, and other appliances to mimic outdoor growing conditions. That's the output of seven large electrical power plants, or one percent of national electricity consumption, wrote Evan Mills, a staff scientist at Lawrence Berkeley National Laboratory, who performed the study independently. Smoking a single joint, Mills wrote, is worth two pounds of carbon dioxide emissions. More>