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Environmental Pollution
Environmental Pollution
3.2
Environmental Pollution
1. Types and sources 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
2. 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
Chapter : Sustainiability of the Environment
Topic : Environmental Pollution
Form 5
Science
View all notes for Science Form 5
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Food Production Technology
Food Processing Technology
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