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  • Resources are classified as natural and man made.
  • Natural resources are further classified as exhaustible and inexhaustible resources.
  • Coal, Petroleum, and natural gas are exhaustible natural resources called as fossil fuels.
  • Coke, coal tar and coal gas are the products Of coal.
  • Petroleum gas, petrol, diesel, kerosene, Paraffin wax, lubricating oil are obtained by Refining petroleum.
  • Coal and petroleum resources are limited. There fore these fuels should be conserved for future use.

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