2. EXHAUSTIBLE NATURAL RESOURCES Limited quantity Likely to be exhausted by human activities E.g.: Wildlife, Forests, Fossil Fuels etc INEXHAUSTIBLE NATURAL RESOURCES Unlimited quantity Not likely to be exhausted by human activities E.g. Sunlight, Air, Water etc

3. Formation of coal

4. Types of coal Peat (60% Carbon) Peat (60% Carbon) Lignite (70% Carbon) Lignite (70% Carbon) Bituminous (80% Carbon) Bituminous (80% Carbon) Anthracite (90% Carbon) Anthracite (90% Carbon)

5.  Coal is used in railway engine to produce steam to run engine.  Coal is still used in homes in villages as fuel to cook food in chulhas.  Coal is used in thermal power plants to produce electricity.  In industries, Coal is used to produce coke, coal tar & coal gas.

6. Destructive distillation of coal

7. Process of destructive distillation of coal

8. Coke:  It is used as an essential raw material for iron and steel industry.  It is used in extraction of many metals from ores. Coal Tar: It is used as starting material for manufacturing dyes, explosives, paints, photographic material, roofing material, etc. Coal Gas: It is an excellent fuel used in industries situated near coal processing units.