3.3 Energy resources
3.3.1 - Outline the range of energy resources available to society.
Fossil fuels are stored energy trapped in the remains of organic life. Oil, coal and natural gas have been produced over millions of years from dead plants, animals and other organic life trapped underground and under great pressure and temperatures. These fossil fuels are non-renewable, that is, they can not be replaced (quickly enough) after they are used. They also cause a great amount of pollution as they are used. It is estimated that these fossil fuels will only last; 50 years for Oil, 70 years for Natural Gas and 250 years for Coal.
Fossil fuels are by far the largest energy source human use: these make up 85% of the worlds energy use;
The remaining 15% comes from renewable energy sources (biomass, hydroelectric, solar, wind and wave power and geothermal)
Fossil fuels are by far the largest energy source human use: these make up 85% of the worlds energy use;
- 37% as Oil
- 25% as Coal
- 23% as Natural Gas
- 6% of of the worlds energy needs comes from Uranium (Nuclear Energy). This is also non-renewable.
The remaining 15% comes from renewable energy sources (biomass, hydroelectric, solar, wind and wave power and geothermal)
3.3.2 - Evaluate the advantages and disadvantages of two contrasting energy sources.
2 Non-renewable Energy Sources
COAL
NATURAL GAS
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2 Renewable Energy Sources
HYDROELECTRIC POWER
WIND
SOLAR
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3.3.3 - Discuss the factors that affect the choice of energy sources adopted by different societies.