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globalchange

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carbon(13)
emissions(8)
density(7)
nitrogen(7)
forests(5)
magnetic field(5)
sediments(5)
carbon dioxide(4)
population(4)
biomass(3)
calcium(3)
ions(3)
lead(3)
metals(3)
methane(3)
mortality(3)
particulate matter(3)
precipitation(3)
sulfur(3)
surface water(3)
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