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globalchange

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carbon(70)
population(44)
emissions(42)
density(35)
atmosphere(34)
conservation(34)
precipitation(28)
velocity(27)
aerosols(26)
lead(22)
sediments(21)
vegetation(21)
biomass(20)
forests(20)
radar(20)
earthquakes(19)
carbon dioxide(18)
ions(18)
isotopes(18)
petroleum(18)
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