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globalchange

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carbon(15)
population(12)
conservation(10)
carbon dioxide(8)
emissions(8)
lakes(8)
density(7)
forests(6)
lead(6)
biomass(5)
isotopes(5)
ocean temperature(5)
coral reefs(4)
drought(4)
gravity(4)
invasive species(4)
mortality(4)
nitrogen(4)
oxygen(4)
population density(4)
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