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globalchange

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carbon(138)
population(138)
precipitation(92)
density(77)
emissions(71)
conservation(68)
lakes(59)
lead(58)
atmosphere(56)
surface temperature(55)
nitrogen(54)
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carbon dioxide(51)
vegetation(48)
heat(45)
magnetic field(44)
isotopes(42)
atmospheric temperature(40)
oceans(38)
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