Wind, Solar Could Play Bigger Roles in Future US Energy Mix
"U.S. climate change legislation now before Congress would mandate that by 2020, 15 to 20 percent of the nation's electricity supply would come from renewable sources like wind and solar.
Currently wind and solar contribute only about 2 percent, with hydropower providing an additional 6 percent.
The new report examines the potential of wind and solar electricity in the United States
Can these renewable sources meet the nation's energy needs?