Water Pollution and Deforestation
- Created by: HLeiper
- Created on: 09-04-14 14:14
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- Water Pollution and Deforestation
- Eutrophication
- Fertilisers enter the water adding extra nutrients
- Extra nutrients cause algae to grow fast and block out sunlight
- Plants cannot photosynthesise and die
- Microorganisms feed on the dead - use up all the oxygen
- Organisms need oxygen - die
- Leaching
- Trees take up nutrients from the soil before they can be washed away - return them when leaves die
- Trees are removed - nutrients do not get replaced; infertile soil
- Disturbing the Water Cycle
- Trees stop rain water reaching rivers too quickly
- Cut down - rain water goes straight into the river
- Transpiration releases rainwater back into the air
- Cut down - make the local area drier
- Soil Erosion
- Tree roots hold soil together
- Cut down - soil can be washed away = infertile
- Disturbing the balance of Carbon Dioxide and Oxygen
- CO2 is released slowly into the atmosphere
- Cut down - released all at once
- Cut down - less photosynthesis and less oxygen
- Eutrophication
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