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Water vapor
feedback is
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thought to be
a positive
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feedback
mechanism.
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Water vapor
feedback
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might amplify
the
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climate’s
equilibrium
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response to
increasing
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greenhouse
gases by as
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much as a
factor of two.
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It acts globally.
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Increase
in
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temperature
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Increase
in
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water
vapor
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in the
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atmosphere
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Enhancement
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of
the
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greenhouse
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effect
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