I think it is around 40,000.
From Wikipedia:
Today there are more than 1,000,000 geothermal heat pump installations in the United States.
The current use of geothermal heat pump technology has resulted in the following emissions reductions[9]:
* Elimination of more than 5.8 million metric tons of CO2 annually
* Elimination of more than 1.6 million metric tons of carbon equivalent annually
These 1,000,000 installations have also resulted in the following energy consumption reductions[9]:
* Annual savings of nearly 8,000 GWh
* Annual savings of nearly 40 trillion Btus of fossil fuels
* Reduced electricity demand by more than 2.6 GW
The impact of the current use of geothermal heat pumps is equivalent to[9]:
* Taking close to 1,295,000 cars off the road
* Planting more than 385 million trees
* Reducing U.S. reliance on imported fuels by 21.5 million barrels (3,420,000 m³) of crude oil
per year. |