Where do Geothermal come from?
Hot rocks underground heat water to produce steam.
Geothermal energy is the heat from the Earth. It’s clean, available everywhere and renewable. But on the other hand it is not always easy to access, there may be natural groundwater in the hot rocks anyway, or we may need to drill more holes to the hot region and steam comes up,or we pump water down to them.
The water is purified and used to drive turbines, which drive electric generators. Or can produce heat directly from hot water. Or use the shallow ground to heat and cool buildings by using heat pumps.
Advantages and Disadvantages:
Geothermal energy does not produce any pollution, and does not contribute to the greenhouse effect. Once you’ve built a geothermal power station, the energy is almost free. But, it is not easy to find a place where you can build a geothermal power station. The kind of rocks that we drill in is also very important. Hazardous gases and minerals may come up from underground, and can be difficult to safely dispose of.