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Renewable energy is energy that comes from sources that are always available in the natural world and cannot be used up. Following are examples of renewable energy and their resources: 


⇒ Solar energy – energy that is produced from the sun whether it is in the form of sunlight particles that can create electricity (solar electricity or photovoltaics) or in the form of heat to warm water or air space 

⇒ Wind energy – energy that is produced from the natural movement of the wind; also considered a form of solar energy because wind is created by differences in the amount of heat that the sun sends to different parts of the earth 

⇒ Biomass energy – energy that comes from materials that were once living like plants or some types of garbage 

⇒ Geothermal energy – energy that comes from heat generated deep inside the Earth from items like hot rocks, hot water and steam
⇒ Hydroelectric energy – energy that is produced from moving or falling water

⇒ Tidal/wave energy – energy that is produced when ocean tides or waves change or move across the ocean or sea
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