Geothermal Power Station. Image credit MediaWiki

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Geothermal power

  • Geothermal power is generated using steam rhythmically shooting out from underground at high pressure in the form of geysers.
  • To control the movement of steam, an intricate network of pipes is installed collecting and directing the steam to turbines on the ground surface.
  • The power of the ejected steam turns the turbines which turn the generators to produce our electricity.
  • Some of the pipes act as safety valves to release excess pressure and steam while others are for driving steam to cooling chambers to convert it back to water.
  • This water is then pumped back to the geyser source underground for reboiling naturally by hot rocks in an area of active volcanicity.
  • Volcanicity is the process where molten magma or lava forces its way out from the earth’s crust unto the earth’s surface.


  • It is clean and environmentally friendly
  • It is renewable
  • Does not require clearing or damming nor does it result in displacement of people
  • It is inexpensive to run as there is no fuel required to turn turbines
  • Reduces dependency on fossil fuels


  • Pollution for example through the release of gases such as hydrogen sulfide
  • Potential water pollution
  • They are location specific and cannot be moved to suit other factors e.g distance to market
  • Plants have high maintenance costs
  • The construction of geothermal stations can affect land stability as there is risk of land subsidence
  • There is also the possibility of depletion

To access more topics go to the O Level Geography Notes page

- See latest Zimbabwe grocery prices -


We publish the latest grocery prices from Zimbabwean supermarkets. We also deliver groceries online

Quick NetOne, Telecel, Africom, And Econet Airtime Recharge

If anything goes wrong, click here to enter your query.