globalchange

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population(13)
density(5)
humidity(5)
carbon(4)
conservation(4)
forests(4)
lakes(4)
soil moisture(4)
surface water(4)
acid deposition(3)
carbon dioxide(3)
earthquakes(3)
elements(3)
lead(3)
microwave(3)
oceans(3)
scattering(3)
velocity(3)
aerosols(2)
atmosphere(2)
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