waterways -with sewage, fertiliser and toxic chemicals. Air- with smoke and gases e.g sulphur dioxide which contributes to acid rain. Land- with toxic chemicals such as pesticides and herbicides which can be washed into the water
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Deforestation
occurred so crops can be grown, increase in cattle + rice fields. Has increased levels of CO2 in atmosphere and reducing biodiversity.
2 of 10
Destruction of peat bogs
releases ‘locked up’ CO2 into atmosphere. Peat is removed from bogs as high in nutrients so good for compost. Using peat –free composts helps to preserve
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CO2
we can say that CO2 is sequestered by plants and water (plants take in by photosynthesis and it dissolves in oceans, lakes etc).
4 of 10
An increase in the earths temp changing may:
cause changes to climate, rising sea levels, reduce biodiversity, change migration patterns e.g. – birds, change the distribution of species.
5 of 10
Ethanol based biofuels
Can be produced by fermentation, microorganisms respire anaerobically to produce the ethanol, using sugars from crops as an energy source. Described as carbon neutral
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Biogas
– produced by anaerobic fermentation of bacteria. Plant and animal waste put into biogas generators. These provide ideal conditions for bacteria to reproduce and ferment.
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. Must be at suitable temps and oxygen free conditions. Generators usually buried underground for insulation. By-product – slurry can be used as fertiliser.
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Food production & efficiency
the shorter the food chain the less energy will be wasted. More efficient for us to eat plants. Can produce meat more efficiently by: preventing movement of animal, keeping in warm conditions.
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Fusarium
Is a fungus, used to produce mycoprotein, a protein rich food suitable for vegetarians. Grown aerobically on cheap sugar syrup. Grown in industrial fermenters – large vessels with air supply, stirrers to spread out microorganisms & temp + pH sensors
10 of 10
Other cards in this set
Card 2
Front
occurred so crops can be grown, increase in cattle + rice fields. Has increased levels of CO2 in atmosphere and reducing biodiversity.
Back
Deforestation
Card 3
Front
releases ‘locked up’ CO2 into atmosphere. Peat is removed from bogs as high in nutrients so good for compost. Using peat –free composts helps to preserve
Back
Card 4
Front
we can say that CO2 is sequestered by plants and water (plants take in by photosynthesis and it dissolves in oceans, lakes etc).
Back
Card 5
Front
cause changes to climate, rising sea levels, reduce biodiversity, change migration patterns e.g. – birds, change the distribution of species.
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