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globalchange

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carbon(17)
population(17)
density(14)
atmosphere(10)
carbon dioxide(10)
conservation(10)
precipitation(10)
emissions(9)
heat(7)
landscape(6)
oxygen(6)
soils(6)
urban areas(6)
vegetation(6)
hydrocarbons(5)
isotopes(5)
lakes(5)
nitrogen(5)
surface water(5)
aerosols(4)
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