Direct or non-electric utilization of geothermal energy is the immediate use of the heat energy rather than to its conversion to electrical energy. Some of the primary form of direct use include swimming, bathing and balneology (therapeutic use), agriculture (mainly greenhouse heating and some animal husbandry),aquaculture (mainly fish pond and raceway heating), industrial processes, etc. http://www.digtheheat.com/geothermal/geothermal_agriculture.html
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