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globalchange

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population(14)
conservation(12)
biomass(9)
lakes(9)
fisheries(7)
carbon(6)
emissions(6)
landscape(6)
nitrogen(6)
density(5)
lead(5)
public health(5)
salinity(5)
elements(4)
grasslands(4)
surface water(4)
vegetation(4)
velocity(4)
contaminants(3)
forests(3)
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