Renewable Energy (Cambridge (CIE) O Level Geography)
Revision Note
Author
Bridgette BarrettExpertise
Geography Lead
Importance of Renewable Energy Sources
Renewable energy are energy sources which are infinite and will not run out. They include:
Hydroelectric
Wave/tidal
Wind
Solar
Geothermal
Biomass/waste
Once in place with the exception of biomass/waste they do not produce any greenhouse gas emissions
Greenhouse gases may be emitted in the production, construction and transport of the equipment
Increase in renewable energy
Renewable energy is increasingly important in the global energy mix
This is due to:
Non-renewable fossil fuels will at some point run out and so they need to be replaced with another energy source
The use of non-renewable fuels is damaging to the environment.
Fossil fuels when burnt release greenhouse gases and the sulphur dioxide released causes acid rain
Mining and drilling for fossil fuels can destroy habitats and damage the surrounding environment
Increasing awareness of the impact of using fossil fuels has resulted in international pressure to reduce their use
Countries wanting to reduce their reliance on imports of energy sources and improve their energy security
Advantages and disadvantages
All renewable energy sources have advantages and disadvantages
Energy Source | Advantages | Disadvantages |
---|---|---|
Hydroelectric |
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Wave/Tidal |
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Wind |
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Solar |
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Geothermal |
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Biomass/Waste |
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Exam Tip
Remember reducing fossil fuel use is not as easy as simply switching to renewable energies. Although the costs are coming down renewable energy is often still more expensive than using fossil fuels and they are generally not as efficient. This means you need far more to produce the same amount of electricity.
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