What are the main ways that waste may cause problems?
Pollution of water, polution of air and polution of the land.
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What effects has large-scale deforestation had?
Increased the release of carbon dioxide into the atmosphere and reduced the rate at which carbon dioxide is removed from the atmosphere and 'locked up' for many years as wood.
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What is the main reason for loss of biodiversity?
Deforestation.
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Why is deforestation taking place?
So that crops have space to grow and so that there can be an increase in cattle and rice fields for more food.
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Why has there been an increase in methane in the atmosphere?
Because there have been an increase of the number of cattle and rice fields and these produce methane.
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The destruction of peat bogs and other areas of pete releases what?
Carbon Dioxide
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What are the two main gases that are increasing which are contributing to global warming?
Carbon dioxide and methane.
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How can biofuels be produced?
From natural products by fermentation
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How can biogas (mainly methane) be produced?
Through anaerobic fermentation of a wide range of plant products or waste material containing carbohydrates.
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How come food efficiency is reduced when there are a greater number of stages in the food chain?
Because energy is lost along each stage of the food chain. Through heat loss, pooing and respiration.
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What 2 main things play an important role in conservation of fish stocks?
Net size and fishing quotas.
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What fungus is useful for producing mycroprotein, a protein-rich food suitable for vegertarians?
Fusarium.
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How is the fungus 'fusarium' grown?
On glucose syrup, in aerobic conditions and the biomass is harvested and purified.
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Other cards in this set
Card 2
Front
What effects has large-scale deforestation had?
Back
Increased the release of carbon dioxide into the atmosphere and reduced the rate at which carbon dioxide is removed from the atmosphere and 'locked up' for many years as wood.
Card 3
Front
What is the main reason for loss of biodiversity?
Back
Card 4
Front
Why is deforestation taking place?
Back
Card 5
Front
Why has there been an increase in methane in the atmosphere?
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