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agriculture(2)
carbonate(2)
drought(2)
population(2)
vegetation(2)
coastal areas(1)
conservation(1)
fertilizers(1)
humidity(1)
infrastructure(1)
isotopes(1)
lakes(1)
landscape(1)
malnutrition(1)
oxygen(1)
paleoclimate(1)
pollen(1)
precipitation(1)
reforestation(1)
runoff(1)
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