Wood is the main fuel for cooking and other domestic requirements.

The main fuel is natural gas, with light fuel oil a secondary.

Almost all households (96.2%) use firewood as the main fuel for cooking.

Boilers in some power stations use processed natural gas as their main fuel.

He said the government also needed to deregulate the supply of natural gas, the main fuel used in new power plants.

Fire was civilization's first great energy invention, and wood was the main fuel for a long time.

Gas supply (main fuel for the factory's operations) has been cut off, although it can be restored.

It was the main fuel used for large-scale cooking and faggots were brought into the city every day.

The station uses natural gas as the main fuel.

Greater attention must also be paid to security of supply for the main fuels.