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Please click here to read Part 3: http://www.allianceengineering.ca/industry/geothermal-energy-in-commercial-buildings-renewability-not-reliance/

Geothermal electric applications generate a small fraction of the emissions of conventional fossil fuels. Geothermal has minimal land and freshwater requirements.

Geothermal plants use 3.5 square kilometres (1.4 sq mi) per gigawatt of electrical production (not capacity) versus 32 square kilometres (12 sq mi) and 12 square kilometres (4.6vsq mi) for coal facilities and wind farms respectively (Wikipedia). They use 20 litres (5.3 US gal) of fresh water per MW·h versus over 1,000 litres (260 US gal) per MW·h for nuclear, coal, or oil.