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11 Cards in this Set
- Front
- Back
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Why does increased population lead to less land available for animals and plants?
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Building, quarrying, farming, dumping waste |
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How do humans pollute water? |
With sewage, fertiliser and toxic chemicals |
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How do humans pollute air? |
With smoke and gases (e.g. sulphur dioxide leads to acid rain) |
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How do humans pollute land? |
With toxic chemicals (e.g. pesticides and herbicides) |
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How might sewage and fertilisers cause eutrophication? |
1. Increase in concentration of mineral ions in water 2. simulates growth of algae and/ or plants 3. Growth results in some plants not receiving sufficient light 4. therefore they die because they can't photosynthesise 5. increases in microorganisms to feed on theses dead organisms 6. respiration of the microorganisms reduce oxygen concentration in water 7. Death of aerobic organisms |
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Why might deforestation occur?
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crops can be grown for biofuels |
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What is the result of large scale deforestation? |
reduced rate at which carbon dioxide is remove from the atmosphere loss of biodiversity |
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What is the result of the destruction of peat bogs?
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Releases carbon dioxide into the atmosphere |
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Why are peat bogs being destroyed?
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Used in compost |
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What might be the result of global warming? |
changes in migration patterns changes in the distribution of species |
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Where is carbon dioxide sequestered? |
In oceans, lakes and ponds |
