The power is always greener on this side of the mountain. Green Mountain Energy, a NRG Energy company, buys and resells green power generated from hydroelectric, solar, wind, geothermal, and natural and landfill gas facilities. It serves households in competitive markets in Illinois, Massachusetts, Maryland, New Jersey, New York, Pennsylvania, and Texas. Since 1997 Green Mountain Energy has helped develop more than 70 wind and solar renewable facilities around the US. These have been responsible for avoiding the use of more than 37.7 billion pounds of carbon dioxide emissions, a primary contributor to global warming (or the equivalent of taking 3.6 million automobiles off the road).