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Renewable & Non-Renewable Energy Week 11

Renewable & Non-Renewable Energy Week 11 -...

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Renewable energy is energy which comes from natural resources such as sunlight, wind, rain, tides, and geothermal heat, which are renewable (naturally replenished). In 2006, about 18% of global final energy consumption came from renewables, with 13% coming from traditional biomass, which is mainly used for heating, and 3% from hydroelectricity. New renewables (small hydro, modern biomass, wind, solar, geothermal, and biofuels) accounted for another 2.4% and are growing very rapidly. The share of renewables in electricity generation is around 18%, with 15% of global electricity coming from hydroelectricity and 3.4% from new renewable. Wind power is widely used in Europe, Asia & U.S.
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Geothermal roots from Greek, where geo means Earth and thermos meaning heat. Geothermal power is cost effective, reliable, sustainable, and environmentally friendly, but has historically been limited to areas near tectonic plate boundaries. Advantages of Geothermal Energy: Low costs Consumes less electricity More efficiency than gas and oil furnaces A highly acceptable solution as greenhouse gases and air pollutants levels are less Cools and operates quietly Disadvantages of Geothermal Energy: High installation costs Requires lots of space Needs a bedrock base Installation is tricky
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Tidal energy is a hydropower which converts the energy of tides into electricity or other useful forms of power. Although not yet widely used, tidal power has potential for future electricity generation. Tides are more predictable than wind energy and solar power. Among sources of renewable energy, tidal power has traditionally suffered from relatively high cost and limited availability of sites with sufficiently high tidal ranges or flow velocities, thus constricting its total availability.
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