Erika Kaeten
Fossil
Fuels
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When
burned, carbon stored in them combines with oxygen to form carbon dioxide.
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The burning of fossil fuels releases
about 5.6 billion tons of CO2 into the air every year. The amount
is expected to increase. Some scientists estimate that the number
will jump to as much as 30 billion tons per year within the next few decades.
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Industrial nations contribute about
75% of the release, or emission, of CO2 from burning fossil fuels.
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In cities there is much fossil fuel
burning, many people breathing out CO2, and few trees
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