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The trick to harvesting energy
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"scientists have started to rethink the possibilities for salvaging wasted energy what they term "energy harvesting". They are finding ways to capture the heat lost from buildings, the idle power drain of computers or the motions of the human body, and to convert it into useful, clean electricity. But that is not all: energy harvesting permits devices that are free from a battery or an external power source. With these restrictions removed, the devices can be placed or moved anywhere, scaled to dimensions smaller than ever and designed to exist without maintenance."

"..Most people rarely acknowledge the energy that is lost to the environment. Rather than chase it, we have opted to generate more. The past 35 years have seen a tripling of world electricity demand, which has predominantly been met through the burning of additional fossil fuels. With less than a 3% contribution to global energy production, those technologies that exploit what is already around us solar, wind and tidal power, for example barely feature.



"Recently, however, and partly in response to the drive for lower carbon footprints, scientists have started to rethink the possibilities for salvaging wasted energy what they term "energy harvesting". They are finding ways to capture the heat lost from buildings, the idle power drain of computers or the motions of the human body, and to convert it into useful, clean electricity. But that is not all: energy harvesting permits devices that are free from a battery or an external power source. With these restrictions removed, the devices can be placed or moved anywhere, scaled to dimensions...." - more
Posted on: Jun. 10, 2009 10:22am,UTC
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RCA Airnergy claims to charge gadgets using ambient WiFi signals
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Posted on: Jan. 13, 2010 12:54pm,UTC
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