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IB Pollution © Oxford University Press 2011 Air can be polluted by smoke and gases such as sulfur dioxide.
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IB3.24.3 Pollution
© Oxford University Press 2011
Pollution
IB3.24.3 Pollution
© Oxford University Press 2011
Pollution can affect land, air, and water.
Can you give examples of each?
IB3.24.3 Pollution
© Oxford University Press 2011
Air can be polluted by smoke and gases such as sulfur dioxide.
IB3.24.3 Pollution
© Oxford University Press 2011
Land can be polluted by waste going to landfill sites.
IB3.24.3 Pollution
© Oxford University Press 2011
Water can be polluted by sewage, pesticides, and other human activities.
IB3.24.3 Pollution
© Oxford University Press 2011
Pollutant Source Effect on environment
Untreated sewage
Sewage works
Fertilisers Farms
Pesticides and herbicides
Farms
Toxic chemicals
Factories and mining
Detergents Domestic use
Oil Tankers and pipelines
Water PollutionWater Pollution
IB3.24.3 Pollution
© Oxford University Press 2011
Pollutant Source Effect on environment
Untreated sewage
Sewage works Bacteria can cause disease, e.g typhoid and cholera. Nitrates in the water lead to the death of fish by a process called eutrophication.
Fertilisers Farms Nitrates in the water (as above).
Pesticides and herbicides
Farms These chemicals are washed into waterways and may build up in food chains to toxic levels.
Toxic chemicals
Factories and mining
Poison organisms directly, or may build up in food chains to toxic levels.
Detergents Domestic use Kill valuable microbes.
Oil Tankers and pipelines
Kills birds and fish.Pollutes the sea bed.
Water PollutionWater Pollution
