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conservation(28)
population(25)
forests(16)
carbon(11)
vegetation(10)
density(9)
urban areas(8)
biomass(7)
emissions(7)
fisheries(7)
coral reefs(6)
surface water(6)
deforestation(5)
landscape(5)
lead(5)
oceans(5)
rural areas(5)
aerosols(4)
altitude(4)
atmosphere(4)
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