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carbon(11)
forests(10)
population(8)
nitrogen(7)
conservation(6)
density(4)
emissions(4)
lakes(4)
oceans(4)
surface water(4)
vegetation(4)
biomass(3)
carbon dioxide(3)
coral reefs(3)
degradation(3)
isotopes(3)
landscape(3)
minerals(3)
particulate matter(3)
agriculture(2)
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