Environmental Pollution

3.2 Enviromental Pollution
 
Types and sources of environmental pollution
 

Type of Environmental Pollution.

 
Type of environmental pollution Sources of environmental pollution
Air pollution

Natural air pollution

  • volcanic eruptions
  • forest fires
  • dust storms 
  • decaying organic waste

Man-made air pollution

  • exhaust gases from motorised equipment or vehicles
  • blast furnaces
  • thermal power stations
  • industries and garbage disposal sites
Water pollution

Waste 

  • wastewater
  • domestic waste such as detergents and sewage 
  • solid waste such as rubbish
  • industrial waste such as grease
  • Chemical substances used in agriculture such as chemical fertilisers and pesticides 
  • Oil spills
Land pollution

Excessive use of fertilisers and pesticides

Inappropriate management of solid waste

Acid rain

Nuclear waste 

Electronic waste

Thermal pollution

Deforestation 

Industrial activities

Fuel combustion in vehicles or machines

 
Level of water pollution from domestic waste

 

  • Air pollutant index (API): air pollution parameter which is measured to determine air pollution level 
  • Biochemical Oxygen Demand (BOD):
    • the water pollution parameter which is measured to determine water pollution level
    • the amount of dissolved oxygen needed by microorganisms
    • the higher the BOD of a water sample, the more microorganisms can be found in it

 

 

Environmental Pollution

3.2 Enviromental Pollution
 
Types and sources of environmental pollution
 

Type of Environmental Pollution.

 
Type of environmental pollution Sources of environmental pollution
Air pollution

Natural air pollution

  • volcanic eruptions
  • forest fires
  • dust storms 
  • decaying organic waste

Man-made air pollution

  • exhaust gases from motorised equipment or vehicles
  • blast furnaces
  • thermal power stations
  • industries and garbage disposal sites
Water pollution

Waste 

  • wastewater
  • domestic waste such as detergents and sewage 
  • solid waste such as rubbish
  • industrial waste such as grease
  • Chemical substances used in agriculture such as chemical fertilisers and pesticides 
  • Oil spills
Land pollution

Excessive use of fertilisers and pesticides

Inappropriate management of solid waste

Acid rain

Nuclear waste 

Electronic waste

Thermal pollution

Deforestation 

Industrial activities

Fuel combustion in vehicles or machines

 
Level of water pollution from domestic waste

 

  • Air pollutant index (API): air pollution parameter which is measured to determine air pollution level 
  • Biochemical Oxygen Demand (BOD):
    • the water pollution parameter which is measured to determine water pollution level
    • the amount of dissolved oxygen needed by microorganisms
    • the higher the BOD of a water sample, the more microorganisms can be found in it