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  How are natuaral factors affecting the surface and atmosphere of the earth?

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There are a series of factors, e.g. the sun (and solar activity) and the earth's orbit and volcanic eruptions. Mankind also have an impact - think actions that lead to greenhouse gases and deforestation for example - although for the purposes of what you are being asked to do, its possible that human activity is excluded.
jon.ellis
20 June 2011
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