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Fossil fuels such as coal, oil and gas
evolve from natural material that
absorbed carbon dioxide from the
atmosphere millions of years ago.
When burnt, the carbon dioxide
is released, leading to
increased concentrations within
the atmosphere.
The difference between wood and fossil
fuels is one of time scale.
Burning wood also releases carbon dioxide
into the atmosphere. However, the same
amount of carbon dioxide is absorbed by
the tree whilst growing over the previous
few months or years, creating a balance
between carbon emitted and absorbed.
Therefore burning wood as a fuel is
considered to be carbon neutral.
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