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globalchange

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carbon(4)
conservation(2)
precipitation(2)
vegetation(2)
aerosols(1)
agriculture(1)
atmospheric temperature(1)
carbon dioxide(1)
degradation(1)
emissions(1)
forests(1)
fossil fuel burning(1)
grasslands(1)
irrigation(1)
islands(1)
isotopes(1)
land management(1)
loess(1)
nitrogen(1)
optical depth(1)
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