Minnesota Town to Tap into its Own Sewers for Geothermal Energy

Cities and companies around the world tap into geothermal energy — the thermal energy below the Earth’s surface — but there’s another type of man-made energy coursing through sewer pipes beneath cities and towns:sewage. The town of Brainerd, Minnesota plans to develop a unique alternative energy system that will tap into the thermal energy in sewer pipes to heat and cool buildings.