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Newly Planted Forests = Net Absorbers
· Younger trees grow more rapidly, turning the
carbon dioxide into wood. There is little old
wood, and only small amounts of decay,
meaning respiration gives out less carbon
dioxide then is being taken in for
photosynthesis.
· This means the system is a net absorber of
carbon dioxide.…read more

Slide 3

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Older Forests = Carbon Store
· As the forest gets older, the system will
become more balanced. There will be a state
of equilibrium between the absorption
through photosynthesis and emission of
carbon dioxide through respiration in the
forest.
· The forest will become a carbon store with
carbon locked in the biomass.…read more

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Why are the worlds forests limited in
the amount of carbon dioxide they can
absorb?
· With the increased carbon dioxide concentrations
and higher temperatures, the forests will soak up
extra carbon dioxide for a sort period of time.
· This is because with the increased growth of
plantations, there is more food, meaning more
animals. This would lead to an increase of decay-
causing microbes, leading to more respiration and
a higher output of carbon dioxide.
· Space is also a limiting factor.…read more

Slide 5

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What effect would temperature have
on carbon dioxide levels?
· Recently there has been a suggestion that an
increase by about 5C or 6C in the worlds
average temperature could lead to a decrease
in water available to rainforests.
· This would cause a decline in growth and
forests and cause an increase in global carbon
dioxide emissions.…read more

Slide 6

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Strategies to reduce carbon dioxide in
our atmosphere:
· Improving energy efficiency
· Using less fossil fuels, replacing them with
more sustainable resources
· Capturing carbon dioxide and putting it in the
oceans so microscopic algae in the ocean can
incorporate it into biomass, meaning the
ocean can act like a carbon sink.…read more

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