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globalchange

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carbon(7)
nitrogen(7)
forests(5)
rural areas(5)
biomass(4)
population(4)
solar radiation(4)
surface water(4)
lakes(3)
minerals(3)
oxygen(3)
urban areas(3)
absorption(2)
evapotranspiration(2)
fertilizers(2)
grasslands(2)
heavy metals(2)
metals(2)
nutrients(2)
petroleum(2)
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