Solid Fuels
Coal- used to produce electricity through steam engines
Wood- used as fuel
Liquid Fuels
Petrol- Used to run small automobiles like bike and car
Kerosene- Used for domestic heating purposes and jet engines as fuel.
Gaseous fuels
Liquified Petroleum Gas (LPG) – It is used for industrial purpose
Compressed Natural Gas (CNG) - CNG is used to run automobiles.