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2466678
Pollution
Description
Air pollution: causes, indicators and effects. Water pollution: causes, indicators and effects. Eutrophication - the process.
No tags specified
biology
pollution
gcse/o-level
Mind Map by
zodored15
, updated more than 1 year ago
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Created by
zodored15
over 9 years ago
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Resource summary
Pollution
Air Pollution
Causes
Combustion of fossil fuels (in engines and power stations)
Effects
Smokes deposits soot on buildings and trees, causing them damage
Also permeates the air making it difficult to breathe
Carbon monoxide is poisonous
Carbon dioxide contributes to greenhouse effect
Which contributes to global warming
Sulfur dioxide contributes to acid rain
Indicators
Bushy lichens need really clean air to survive
Crusty lichens can survive in more polluted air
Water Pollution
Indicators
Fresh water shrimp and stonefly - clean water
Sludgeworm and bloodworm - clean water
Causes
Nitrate fertilisers washed off into rivers and reservoires
Sulfur dioxide in the air dissolves in seas and oceans
Pesticides used by farmers washed of into rivers
Effects
Death of aqautic organisms
Makes drinking water unhealthy, unsafe and unclean
Eutrophication
Excessive richness of nutrients in a body of water which causes a dense growth of plant life
Algal bloom
1. Nutrients from fertilisers are washed off into rivers
2. Pollutants encourage the growth of algae and other plants
3. Algae blooms, preventing sunlight reaching other plants and hence, oxygen depletes
4. Dead plants are decomposed by bacteria, further depleting oxygen
5. As a result, the aquatic ecosystem dies as nothing can live
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