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"Think about the reasons that you use energy. At first you might think that you consume power and goods in order to keep you alive and sustain yourself. However, humans could survive with only a small amount of locally grown food, and minimal heating. In"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/economics/does-using-energy-cheer-you-up.html>