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Biomass - Wood Burning.
(Links in pink will take you to the GCSE Chemistry site).
A wood burning power station is similar to one which burns fossil fuel.
The original
source of the energy is the
Sun.
Growing trees use sunlight energy for
photosynthesis.
Advantages of wood burning.
1. It is renewable.
Trees can be grown at the same
rate as they are burnt.
2. It is reliable.
3. Although burning wood produces
carbon dioxide,
it does not contribute to global warming.
This is because the growing trees take
in carbon dioxide for photosynthesis
at the same rate that the power station emits carbon
dioxide during burning.
Disadvantages.
1. Wood burning produces sulfur dioxide which causes acid rain.
2. A large area is needed
to grow enough trees
to keep the
power station running.
The land could be used for other
purposes, for example growing
food.
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