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We would not be able to continue this work without the help of our Key Sponsors. We appreciate any support with our sponsors as supporting them supports the Maryland Geothermal Association!... The Maryland Geothermal Association (MGA) is a non-profit trade organization that was formed in 2013 in order to promote the development and installation of highly efficient geothermal heating and cooling systems for both residential and commercial applications. We are the installers, drillers, excavators, manufacturers, and distributors who make geothermal possible in the state of Maryland... Heat and cool with dirt, not oil. Yes, Dirt. The ground beneath your feet is being used by millions to heat and air condition their homes. Geothermal heating and cooling is 4 times as efficient, costs less to operate, and can be a smart investment. The Maryland Geo Association is advancing the adoption of green technology in the state of Maryland.