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This country is rich in coal.

I once saw a man walk barefoot over hot coals.

The coal is burning.

The coals are burning red.

Coal is not always black.

The coal in the stove is burning.

The vessel was loaded with coal, lumber, and so on.

This cola has lost its fizz and doesn't taste any good.

Many workers were trapped in the coal mine.

Petroleum was replacing coal as fuel.

They substituted coal for oil.

They're loading coal into the ship now.

The coal was glowing in the fire.

I marveled at seeing the Chinese people burning coal.

Will the strike affect the price of coal?

This material absorbs CO2.

The amount of carbon dioxide has increased by 10 percent.

Carbon dioxide is not a poison in itself.

Trees give off oxygen and absorb carbon dioxide.

Massive amounts of carbon dioxide are generated every day.

All living things on Earth contain carbon.

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

Coal consists mostly of carbon.

Do you know anything about complex carbohydrates?

I don't drink carbonated drinks.

When the ocean absorbs a lot of CO₂, the water becomes more acidic.

Carbon dioxide sometimes harms people.

Coal is chemically allied to diamonds.

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

That branch is affiliated to the miners' union.

Pasta is high in carbohydrates.

Tropical rainforests produce oxygen and consume carbon dioxide.

Coal is a fossil fuel.

Carbon dioxide is also called carbonic gas.

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