globalchange

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surface water(14)
carbon(13)
conservation(12)
vegetation(9)
grasslands(7)
evapotranspiration(6)
landscape(6)
population(6)
precipitation(6)
agriculture(5)
irrigation(5)
water quality(5)
density(4)
nitrogen(4)
soils(4)
air quality(3)
atmospheric temperature(3)
carbon dioxide(3)
drought(3)
lakes(3)
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