Geothermal Power is the Steam from underground is heated when in contact with hot rocks.
The steam finds its way to the surface through fissures or cracks.
The steam is tapped and used to turn turbines and thus generate electricity e.g. at Olkaria in Kenya.
Advantages of geothermal power
- Cheaper as no fuel is required to turn turbines.
- It is Continuous.
- It’s inexhaustible, unlike hydro-power which depends on water levels.
- The cost of operating a geothermal power station is low compared to a hydro-power station.
- A good supplement for other sources of energy.
Disadvantages of geothermal power
- Causes noise pollution from generation plants.
- Not available in many areas where there aren’t hot springs and geysers.
- Gases released with steam may pollute the environment e.g. sulphur dioxide, hydrogen sulphide, methane, ammonia, etc.
- Its exploration is expensive because it requires expensive technology