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globalchange

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atmosphere(11)
carbon(9)
density(8)
carbon dioxide(7)
ultraviolet radiation(7)
oxygen(4)
altitude(3)
corona(3)
nitrogen(3)
scattering(3)
tides(3)
atmospheric pressure(2)
biosphere(2)
coral reefs(2)
emissions(2)
solar activity(2)
vegetation(2)
absorption(1)
agriculture(1)
airglow(1)
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