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© NASA Kids Science News Network

An energy source that we can use over and over again.

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© Encyclopedia of Atmospheric Environment

Renewable energy refers to power generated by a renewable source. When the energy is generated, the resource is not depleted or used up. They are naturally replenished, and can either be managed so that they last forever, or their supply is so enormous humans can never meaningfully deplete them. Unlike fossil fuels, most renewable energy sources do not release carbon dioxide and other air pollutants as by-products into the atmosphere. As the amount of fossil fuel resources on Earth decreases, it is becoming increasingly important to find and utilise alternative fuels.

Examples of renewable resources include:

wind power, solar power, biofuels, hydro-electric power (HEP), geothermal energy, tidal power, wave energy.

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Air Pollutant
Atmosphere
Biofuel
Energy
Fossil Fuel
Geothermal Energy
Nonrenewable Energy
Renewable Energy Resource
Solar Energy
Tidal Power
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