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Wind, solar and geothermal, Energy resources and their uses, hydro…
Wind, solar and geothermal, Energy resources and their uses, hydro electricity, waves and tides
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wind, solar and geothermal
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Solar cells, expensive but no damage to the environment
They generate electric currents directly from sunlight, they are often the best source of energy in watches and calculators
Used in remote places, also to power electrical road signs and satellites
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In sunny countries it is very reliable, they can still be cost effective even in cloudy countries
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Hydro electricity, waves and tides
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