... electricity. The sun is continuously emitting enormous amounts of energy. A fraction of that energy reaches the earth. The fraction of the energy from the sun that reaches the earth in just one day is still more than enough to cover the energy use of the world in a whole year. ... buildings account for one-third of the North American energy use, including the energy used to generate electricity in buildings. Solar design, better insulation, and more efficient appliances could reduce this demand by 60 to 80 percent. If properly designed, buildings can capture the sun's heat in the winter ...

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• Approx Pages: 4