Fuels serve as a major part of our energy requirement. They are the concentrated store of energy, which is related as heat when fuels are burnt. Fuels are combustible substances of organic origin or artificially obtained substances, which are used for producing heat and energy. Wood, diesel, coal .domestic gas, petrol and biogas are some of the examples of fuels.

Fuels play an important role in our everyday life because they are used in homes, transport and industry for providing energy.

For domestic use:

Fuels like wood, coal, kerosene, domestic gas, cow dung etc. are used in our homes for cooking.

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For transport:

Coal, diesel and petrol are used as fuel for road, sea and air transport in automobiles and locomotives. For example, coal is used for running steam engines; Petrol and diesel are used for running buses, cars, trucks, aeroplanes, etc.

In industry:

Fuels like coal and natural gas are used in industries to heat up boilers.

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To generate electricity:

Specially prepared fuels like hydrazine (NH2 NH2) are used in rockets to explore space.

As rocket fuel:

Specially prepared fuels like hydrazine (NH2 NH2) are used in rockets to explore space.