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An electric oven uses one kilowatt-hour of electricity in about 20 minutes, but one kilowatt-hour will power a TV for 3 hours, run a 100-watt bulb for 12 hours, and keep an electric clock ticking for 3 months.
 

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Tehrmal energy harvestingIn time of increase of energy consumption and pollution of environment, many efforts are being made to switch to green energy sources. These sources are all around us, they just need to be harvested.

 

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