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globalchange

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carbon(8)
magnetic field(6)
density(4)
precipitation(4)
terrestrial ecosystems(4)
drought(3)
fronts(3)
minerals(3)
population(3)
agriculture(2)
biosphere(2)
carbon dioxide(2)
droughts(2)
ions(2)
organic carbon(2)
petroleum(2)
silicate(2)
velocity(2)
air quality(1)
altitude(1)
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