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forests(5)
carbon(4)
nitrogen(4)
biomass(2)
density(2)
fertilizers(2)
humidity(2)
organic carbon(2)
population(2)
snow cover(2)
soil chemistry(2)
soils(2)
absorption(1)
carbon dioxide(1)
conservation(1)
crown(1)
environmental impacts(1)
erosion(1)
hydrothermal vents(1)
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