Based on current rates of growth and available technologies, renewable energy—solar, wind, geothermal, and biomass—could provide 10% of U.S. electricity by 2020, according to a National Research Council report released June 15.
However, these sources of non-hydroelectric power generate less than 2.5% of U.S. electricity today, and under a business-as-usual scenario, they would reach only 8% of U.S. need by 2030, says the report. However, looking just at wind, recently applied consistent and aggressive policies to encourage wind's development have put this source of renewable energy on a growth curve to reach 8% by 2020, says K. John Holmes, who is the NRC staff director for this study.
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