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globalchange

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carbon(238)
population(232)
precipitation(145)
emissions(126)
conservation(122)
lead(113)
atmosphere(112)
density(112)
heat(91)
sediments(85)
vegetation(82)
lakes(81)
carbon dioxide(77)
isotopes(77)
forests(74)
velocity(67)
oxygen(65)
islands(62)
mortality(62)
nitrogen(61)
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