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globalchange

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carbon(27)
population(18)
organic carbon(12)
lead(11)
nitrogen(11)
biomass(10)
precipitation(10)
heat(9)
vegetation(9)
carbon dioxide(8)
conservation(8)
forests(8)
nutrients(8)
surface water(8)
urban areas(8)
atmosphere(7)
density(7)
emissions(7)
aerosols(6)
minerals(6)
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