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Tom believes he has a very low carbon footprint.

He's a carbon copy of his father.

Carbon monoxide is a poisonous substance formed by the incomplete combustion of carbon compounds.

Carbon dioxide sometimes harms people.

It is said that global warming is directly related to carbon dioxide emissions.

Trees produce oxygen and absorb carbon dioxide.

Carbon dioxide is a gas that is produced every time a fuel such as coal, oil, or natural gas is burned.

1/4 of the world's carbon dioxide emissions are from America: its per-capita emissions are also the greatest in the world.

The differing volumes of carbon emissions are plotted in the graph below.

U.S. researchers assembled carbon nanotubes to create the world's blackest substance, able to absorb over 99 percent of light that hits it.

Coal consists mostly of carbon.

It is a term used to describe the warming of the earth due to increasing amounts of carbon dioxide in the atmosphere.

That would lead to the production of more carbon dioxide, the main gas responsible for global warming.

The government hopes that lowering its carbon emissions will set an example and that other countries will follow suit.

You shouldn't sleep with a coal stove on because it releases a very toxic gas called carbon monoxide. Sleeping with a coal stove running may result in death.