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Give the names of two energy sources tha...

Give the names of two energy sources that you would consider to be exhaustible. Give reasons for your choices.

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Coal/petroleum and wood are two exhaustible sources of energy.
Coal/petroleum : These fuels were formed over millions of years ago and there are only limited reserves. If we continue to use them as at present, these reserves will be exhausted very soon.
Wood : It is obtained from forests. Forests are decreasing at very fast rate due to deforestation. If deforestation is continued at this rate, then there would be no wood left on the Earth. Hence, wood is an exhaustible source of energy.
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