If you think the lack of technology is the reason we don't have more wind and solar power, think again.
The National Research Council on Monday published a report that finds that renewable energy sources--wind, solar, geothermal, wave, tidal, and biomass--could supply 10 percent of U.S. electricity supply in 2020 with existing technology. Today, renewable energies excluding hydro power are about 2.5 percent of the U.S. electricity mix.
Getting to 20 percent of U.S. electricity by 2035 is possible with sustained policies and investment, it said. To achieve more than 50 percent of electricity generation … Read more