Carbon monoxide gas is created by fuel burning devices because not all of the fuel is burned.

VOA: special.2010.02.02

Fuel-burning devices can create carbon monoxide gas because not all of the fuel is burned.

VOA: special.2011.01.25

The time that we spend in congested conditions significantly adds to the amount of fuel cars and trucks are burning.

VOA: standard.2010.07.26

Many so-called greenhouse gases, such as carbon dioxide, come from burning fossil fuel such as oil or coal.

VOA: standard.2009.12.16

The bioreactors will grow algae that can produce ethanol fuel through a special process that involves using carbon dioxide from nearby coal-burning power plants to promote faster growth of the algae.

VOA: standard.2009.09.02