Humans & their Environment
- Created by: Dominic Butcher
- Created on: 15-03-13 17:21
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- Humans & their Environment
- Deforestation
- Timber
- Slash and Burn for farmland
- Ruins habitats, Biodiversity & Soil
- Ecotourism - making forests tourist attractions to save them.
- Increases carbon dioxide in the atmosphere
- Peat Cutting
- Burning
- Compost
- Destroys habitats & Biodiversity
- Take many years to form
- Greenhouse Effect
- Causes global warming
- Increased carbon dioxide: more fossi fuels burnt, deforestation, carbon sink is almost full, locked up carbon released
- Carbon dioxide and Methane reflect infrared
- Effects:
- Melting of perma-frost
- Ice caps/glaciers melt
- Sea levels rise
- Flooding and loss of land
- Loss of arctic habitats
- Changes weather conditions
- Change to biodiversity e.g. coral reefs
- Change in migration patterns
- Desertification
- Biofuels
- Made from living organisms or a by-product of their waste
- Can be made from Corn, Sugarcane, Rapeseed, Soya and, currently, waste vegetable oil
- Advantages:
- Less toxic than regular diesel
- Releases less pollution
- Sustainable
- Disadvantages:
- Cannot make enough
- Comes from a food source
- Expensive & pushes up food prices
- Virgin forests being chopped down
- Bio-ethanol
- Made by fermentation using yeast to convert sugars to ethanol
- Advantages:
- Lots of sugars can be fermented
- Carbon Neutral
- Low Pollution - less carbon dioxide and water made
- Distilled to produce more concentrated ethanol
- Disadvantages:
- Crop prices increase
- Land not used for food
- Biogas
- Mixture of carbon dioxide and methane. Produced by microorganisms digesting waste material
- Advantages:
- Readily available
- Domestic & Industrial scale plants
- Carbon neutral
- Disadvantages:
- Slowed production in cooler climates
- Fixed Dome Digester
- Few moving parts
- Varying gas pressure
- Difficult to build
- Floating Dome Digester
- Consistent gas pressure
- Difficult to build
- Lots of moving parts
- Overfishing
- Taking more fish from an area than can be replaced by breeding
- Protection:
- Fishing Quotas:
- Restricting fishing days, size of fish & minimum net size
- Increase restriction for more popular fish, preventing extinction
- Very political - difficult to agree on restrictions
- Marine Nature reserves
- Fishing Quotas:
- Fusarium
- Edible fungus
- Provides protein called mycoprotein
- Grows quickly in the right conditions
- Glucose - provides energy
- Oxygen - for aerobic respiratoin
- Nitrogen - makes protein
- Advantages:
- High in protein
- Low in fat
- Suitable for vegetarians
- Disadvantages:
- People don't like the ideas of eating fungus
- Lower in iron than meat
- Deforestation
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