RPS - Renewable Portfolio Standard

Electric utilities, which account for about 40 percent of the carbon dioxide emitted in the U.S., [may be required] to produce a percentage of their electricity with "climate-friendly" renewable sources such as solar, wind, geothermal, biomass or even tidal power. The so-called Renewable Portfolio Standard, or RPS, has been a particular point of emphasis for Sen. Jeff Bingaman (D-N.M.), the new chairman of the Senate Energy and Natural Resources Committee...."