Sens. Jeff Bingaman (D-N.M.) and Tom Udall (D-N.M.) have introduced legislation to create a national renewable electricity standard under which utilities would be required to obtain a significant percentage of power from renewable sources of energy. Under the proposal, 15 percent of power provided by utility companies would eventually be subject to a renewable electricity standard. Utilities would have to produce at least 11 percent of their power from wind, solar, biomass and other renewable energy sources, while the remaining 4 percent could be achieved through improvements to energy efficiency.

The bill has three Republican co-sponsors: Sam Brownback of Kansas, John Ensign of Nevada, and Susan Collins of Maine.