https://energyeducation.ca/encyclopedia/Geothermal_electricity
As of 2017, there are 28 countries (visible in Figure 3) with a cumulative installed geothermal power capacity of 14305 MW (14.3 billion watts) of electricity from geothermal energy, with a growth rate of 3.3% from 2006 to 2016, and a growth rate of 4.0% for 2017.[3]. Global power capacity is expected to reach 14.5 - 17.6 GWe by 2020.[4] The current power capacity from geothermal is only estimated to be at 6.5% of its potential, meaning that another 200 GWe or more could be used in the future.
Geothermal electricity is a renewable energy source and has relatively low carbon dioxide emissions in electricity production: 45 grams of CO2 are emitted per kilowatt-hour, which is less than 5% of the CO2 emitted by a typical coal-fired power plant, and about 10% that of natural gas power plants.[5]
Geothermal electricity plants can also be used for cogeneration - heating houses with excess energy.