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globalchange

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conservation(14)
carbon(13)
nitrogen(7)
particulate matter(7)
population(7)
carbon dioxide(6)
aquifers(5)
coral reefs(5)
forests(5)
sediments(5)
fisheries(4)
irrigation(4)
landscape(4)
mortality(4)
salinity(4)
contaminants(3)
invasive species(3)
lead(3)
precipitation(3)
soils(3)
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