The Natural Limits of Wind Energy
The amount of energy available in the Earth system to be extracted by wind-turbines is limited, and if sufficient energy is removed the world climate will be affected. These striking conclusions follow from a recent analysis (http://www.earth-syst-dynam.net/2/1/2011/esd-2-1-2011.html) reported from the University of Jena in Germany. Humans use energy in total at a rate of 17 TW (terawatts), 87% of which is provided by fossil fuels. In the effort to mitigate carbon emissions and climate-change, sources of carbon-free renewable energy are sought, particularly wind-power. From a simple engineering perspective, the more wind-turbines are placed around the globe, the more energy
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