This process is called combustion. Fuel can be many things, including:

* Wood: The burning of wood releases heat and light energy.

* Fossil fuels: Coal, oil, and natural gas are common examples. Burning these fuels releases energy for power generation, transportation, and heating.

* Biofuels: These are fuels derived from organic matter, like ethanol and biodiesel.

* Propane and natural gas: These are used for heating homes and cooking.

* Methane: The primary component of natural gas.

The chemical reaction of combustion involves oxygen reacting with a fuel to produce carbon dioxide, water, and energy. This energy is often released as heat and light.