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ANAEROBIC CONDITIONS
CARBON DIOXIDE
3
ACIDIFICATION
2
ADVERSE EFFECTS
2
AFFORESTATION
2
AFFORESTATION ACTIVITIES
2
AGRICULTURAL LAND
2
AGRICULTURAL PRODUCTION
2
AGRICULTURE
2
AIR
2
ALTITUDE
2
AMPHIBIANS
2
ANNUAL EMISSION
2
ANTARCTICA
2
AQUATIC ECOSYSTEMS
2
AQUATIC HABITATS
2
AQUATIC LIFE
2
AQUATIC SPECIES
2
ARID REGIONS
2
ATMOSPHERE
2
ATMOSPHERIC CARBON
2
BASINS
2
BEACHES
2
BIODIVERSITY
2
BIODIVERSITY CONSERVATION
2
BIOLOGICAL CHARACTERISTICS
2
BIOLOGICAL CORRIDORS
2
BIOLOGICAL DIVERSITY
2
BIOLOGICAL RESOURCES
2
BIOMASS
2
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