Fossil fuel power plants are a major source of acid rain. Greenhouses can be heated with hot water from geothermal reservoirs. In some places pipes of hot water are buried under the soil. Geothermal heat is also used to dry crops. Geothermal water is used to help speed the growth of fish, prawns and alligators.
China is probably has more aquaculture operations than any other country.
Aquifers provide about 60 percent of American drinking water. Underground aquifers of hot water and steam are called geothermal reservoirs. This is perhaps the oldest use of natural geothermal waters. Boiling point is also affected by pressure. The greater the pressure, the higher the boiling point.