In this chapter you will learn:
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Energy resources
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Renewable energy resources
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Non-renewable energy resources
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Uses of energy resources
Energy resources
We can classify energy resources as renewable and non-renewable.
Renewable energy resources
Renewable energy comes from natural sources or processes that are constantly replenished. Something that can't run out. These are solar, wind, hydro-electricity, tides, bio-fuels, geothermal and water waves.
Biofuels are fuels made from plants and animal wastes. They can be solid, liquid or gas.
Biofuels are said to be carbon neutral, that means the amount of carbon dioxide that is absorbed by the plants is equal to the carbon dioxide that is released when the fuel is burned.
Biofuels are fairly reliable, as crops can be grown in a relatively short time and different crops can be grown throughout the year.
Solar cells are best source of energy. There is no fuel cost and no pollution.
Geothermal power is reliable and it can be used to generate electricity and to heat building.
Hydro-electric power is an energy resource that generates electricity in a short time period. they can immediately respond to increased demand of electricity and there is no fuel costs.
Wind is a renewable energy resource and there is no fuel costs and no pollution.
Wind turbines can be used to generate electricity and there is minimal running costs.
Renewable energy resources will never run out.
Non-renewable energy resources
Non-renewable energy is a a natural substance that will eventually run out. That is not replenished with the speed at which it is consumed.
Non-renewable energy resources are fossil fuels and nuclear fuel.
Coal, oil and gas are three main fossil fuels.
The main nuclear fuels are uranium and plutonium.
Non-renewable energy resources will eventually run out one day.
Uses of energy resources
Energy resources are needed for heating homes, transport, running appliances and cooking.
Hydro-electric power uses the water stored in dams. It can be used to supply additional demand of electricity.
Most of electricity is generated using fossil fuels and nuclear fuel.