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Filename: | en-1385-d.jpg |
Image Description: | Denver, Colorado - Raw sewage is used to heat and cool buildings at the National Western Center and the Colorado State University Spur campus. The system, operated by Centrio Energy, brings Denver sewage into tthe building (white pipe at left), grinds up solids, runs it through a heat exchanger, and then pumps heated or cooled water to nearby buildings. |
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