February 2025

Exotic commercial forests

By |2025-02-12T09:40:02+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Pine tree forest. Image credit nyobain.com

ZIMSEC O Level Geography Notes: Natural Resources: Forestry in Zimbabwe: Exotic commercial forests

  • These are extensive forest areas planted with imported tree varieties like pine, wattle and eucalyptus.
  • These forests are mainly found in the Eastern Highlands where there was less competition with crop farming […]
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Natural Resources: Water pollution

By |2025-02-12T09:25:05+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

ZIMSEC O Level Geography Notes: Natural Resources: Water: Water pollution

  • Water pollution is the contamination of water bodies for example lakes, rivers, oceans, aquifers and groundwater.
  • This form of environmental degradation occurs when pollutants are directly or indirectly discharged into water bodies without adequate treatment to remove harmful compounds.
  • Water pollution can also be defined as the […]
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Ocean currents and the fishing industry

By |2025-02-12T09:11:44+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Ocean currents of the world. Image credit Pearson

ZIMSEC O Level Geography Notes: Natural Resources: Fishing:Ocean currents and the fishing industry

  • Ocean currents are important in the fishing industry as they affect the growth of plankton which provides fish food.
  • Warm ocean currents restrict the growth of plankton hence give rise […]
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Thermal Power: Locational Factors

By |2025-02-12T09:34:28+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Cooling towers. Hwange Thermal. Image credit esi-africa.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Thermal Power: Location Factors

Fuel source

  • Thermal power stations cab be located at the fuel source.
  • This is if the fuel is difficult to transport.
  • For example Hwange Thermal Power station is located at the coal fields.
  • The […]
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Advantages and Disadvantages of Nuclear power as a source of energy

By |2025-02-12T09:00:19+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Nuclear Power Plant. Image credit drug-alcoholtesting.co.uk

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Advantages and Disadvantages of Nuclear power as a source of energy

Advantages

  • Very long lifespan as half-life of most radioactive substances is about 4 000 years.
  • Has very high energy output.
  • Very efficient energy source.
  • Relatively clean if […]
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