Renewable Energy

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Renewable energy

Renewable energy is any source of energy that doesn't consume the finite resources of the Earth and can be easily and quickly replenished. At present only a small proportion of the world's energy needs come from alternative and renewable energy sources. These exist in many forms including Solar Thermal, Photovoltaics, Wind, Hydro, Tidal/Wave and Bioenergy (including Biomass, Biogas and Biofuels). As with fossil fuels the sun's energy is the ultimate source of these energies.

Non-renewable energy

A non-renewable resource is made up of mostly dead animal skin. The skin then turns into a resource such as oil. Also considered non-renewable are resources that are consumed much faster than nature can create them. Fossil fuels (such as coal, petroleum, and natural gas), nuclear power (uranium) and certain aquifers are examples. Metal ores are prime examples of non-renewable resources. In contrast, resources such as timber (when harvested sustainably) and wind (used to power energy conversion systems) are considered renewable resources.

Electrical energy

Electrical energy is the energy carried by moving electrons in an electric conductor. It cannot be seen, but it is one of our most useful forms of energy because it is relatively easy to transmit and use.

All matter consists of atoms, and every atom contains one or more electrons, which are always moving. When electrons are forced along a path in a conducting substance such as a wire, the result is energy called electricity.

Electrical generating plants do not create energy. They change other forms of energy into electricity. For example, power plants can convert chemical energy stored in fuels into thermal energy, which evaporates water into steam, which produces mechanical energy as it moves through turbines. The turbines spin generators, which produce electricity. All matter consists of atoms, and every atom contains one or more electrons, which are always moving....
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