(a) Classify the following into renewable and non-renewable sources of energy:
Coal, Wind, Tides, Petroleum,Wood, Natural gas
(b) What is the basis of above classification?
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Solution
(a) Coal, petroleum and natural gas are non-renewable sources of energy, whereas wind, tides and wood are renewable sources of energy.
(b) The basis of the above classification is the abundance or depletion of the energy sources mentioned and the amount available for the future.