Distinguish between:
- Commercial and non-commercial sources of energy.
- Conventional and non-conventional sources of energy.
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S. No
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Commercial Sources of Energy
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Non-commercial Sources of Energy
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1.
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Command a price and the users have to pay a price for them.
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These are free and command no price.
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2.
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They are generally exhaustible.
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They are renewable.
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3.
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Mostly used in production processes.
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Mostly used for domestic purposes.
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4.
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Examples: Coal, petroleum, electricity.
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Examples: Vegetable wastes, firewood, dried dung.
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S. No
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Conventional Sources of Energy
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Non-conventional Sources of Energy
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1.
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These include coal, petroleum and electricity.
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These include solar energy, wind energy, and tidal power.
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2.
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These are being used since very long as different sources of commercial sources of energy.
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Most of these are in experimental stage and are being used as different sources of commercial energy to a very little extent.
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3.
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These include both commercial and non-commercial sources of energy.
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These are developed as sources of commercial energy in order to check environmental pollution.
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