What four human activities reduce the amount of land and resources?
Buildings, farming, dumping waste - landfill sites, quarrying for metal ions
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What are two important greenhouse gases? What do they do?
Carbon dioxide and methane - trap the heat in the earth
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What are the names of five important carbon stores?
Oceans, lakes, ponds, green plants and peat bogs
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What does deforestation mean?
Cutting down trees in a forest
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What four main problems does it lead to?
More methane in the atmosphere, more carbon dioxide in the atmosphere, less carbon dioxide taken in, less diodiversity
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Why would people cut down trees?
Use for land for farming: cattle, rice, crops; use for paper, provide timber
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Why would we destroy peat bogs?
Use area after its been drained for farmland, dried peat can be burnt for fuel, compost
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Why is this a problem?
Carbon dioxide is relased when the bog is drained and burnt, less biodiversity
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What is a biofuel?
A fuel made by plants or waste material grown recently
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How do we produce biofuels?
By bacteria breaking down sugars in plants by anaerobic fermentation
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What are the two main gases in biogas?
Methane (70%) and Carbon Dioxide (30%)
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What are the two main types of biogas generator?
Batch generator (makes biogas in small batches) and continuous generator (makes biogas all the time)
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What is mycoprotein?
A protein made from fungi - used in vegetarian meat subsitute
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Why would being a vetegarian help global food shortages?
Energy is lost at each stage of a food chain. The fewer stages in the food chain, the more efficent it would be. So eating the primary produces (plants) is better to get energy than meat
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What two ways can help us maintain fish stocks?
Fishing quotas (limits of the number of fish you have), net size (smaller fish can get away)
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Other cards in this set
Card 2
Front
What four human activities reduce the amount of land and resources?
Back
Buildings, farming, dumping waste - landfill sites, quarrying for metal ions
Card 3
Front
What are two important greenhouse gases? What do they do?
Back
Card 4
Front
What are the names of five important carbon stores?
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