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    Can Non-Fossil Fuel Renewables achieve 15.7 Terawatts?

    September 21, 2012; 1:10 PM ET

    Current human energy use has been calculated to be 15.7 terawatts and growing. Can non-fossil fuel renewable energy sources completely fulfill that need?

    In this 'Earth: The Operator's Manual' video, Dr. Richard Alley explains that the human need can indeed be achieved through the combined effort of non-fossil renewable energy sources such as solar, hydro, geothermal, biomass and conservation.

    Check out the video below as Dr. Alley shows examples of renewable energy sources at work as he adds up the total. Video courtesy of Youtube.

    The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com

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