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Geothermal energy, or literally, heat derived from the earth, is the third most employed renewable resource in the United States. According to the Geothermal Resources Council, more than 2,200 MW of geothermal electric power generation is drawn to support motels, strip malls, nursing homes and modest residential and office buildings, proving an increasing trust in geothermal system performance and reliability.
A group of researchers at the Polytechnic University in Madrid (UPM) are developing a system that keeps windows cool thanks to the addition of a 1cm slot through which the water circulates on the inside to absorb the heat of the sunbeams. Called Intelliglass, it could reduce demand on air conditioning systems by as much as 70%.
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