Renewable sources are those sources which can be replaced after they are used. Hydrogen, wind and solar energy all are inexhaustible and present in surplus amount. Thus they all are renewable sources of energy.
Non-renewable sources are those sources which cannot be replaced. Once they are used they are gone forever because their formation takes a very long time whereas they are consumed quickly. All fossil fuels are non-renewable sources because they are formed in a span of millions of years. Coal, natural gas, and petroleum all are fossil fuels thus they all are non-renewable sources of energy.
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