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globalchange

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organic matter(343)
carbon(200)
organic carbon(110)
nitrogen(77)
soils(64)
sediments(51)
carbon dioxide(49)
oxygen(42)
emissions(41)
vegetation(37)
biomass(36)
degradation(36)
isotopes(35)
nutrients(34)
forests(33)
petroleum(28)
ph(27)
lakes(26)
atmosphere(25)
particulate matter(25)
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