no geothermal energy does not cause pollution! Answer: Geothermal energy uses hot water or steam from deep in the Earth. As a consequence it does not require fuels which produce emissions. However...
there are lots of things people use on a day to day basis that pollute the are ... for example : running vehicles pollute the air, even little things like smoking contribute to air pollution......
Using heat from the earths core water is heated until it boils and produces steam. The steam is then used to turn turbines which crank generators and thus producing electricity.