Renewable energy

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Renewable energy

Renewable energy is sometimes called non-conventional energy. It is derived from regenerative resources or from other resources that can not be depleted. Almost 30% of the total energy consumption is renewable energy.

Renewable energy is used since a long time, but only recently mankind is using it to mass produce electricity. Because non-renewable energy is in general more polluting and exhausting, people try to use renewable energy more often.

World renewable energy

world renewable energy 2005

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Biomass is material of plants and animals that can be used for energy.
Geothermal energy uses heat energy from beneath the surface of the earth.
Fast-flowing water released from dams in mountainous areas can turn water turbines to produce electricity.
Solar cells convert sunlight into electrical energy.
Electricity can be obtained by the flow of water through turbines in a dam as the tide rises and falls.
Moving air turns the blades of windmills or generators to make electricity or to pump water out of the ground.