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globalchange

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carbon(8)
emissions(7)
electricity(3)
carbon dioxide(2)
transportation(2)
elements(1)
gravity(1)
heat(1)
iron(1)
islands(1)
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leads(1)
methane(1)
natural gas(1)
nitrogen(1)
nutrients(1)
petroleum(1)
sea ice(1)
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sustainable development(1)