antifouling agent
antimicrobial
antimycotic
AOT40
AOX value
apparel textiles
appeal procedure
application technology
applied science
approval
approval of installations
aquaculture
aquaculture production
aquaponics
aquatic animal
aquatic ecology
aquatic ecosystem
aquatic eutrophication
aquatic fauna
aquatic flora
aquatic insect
aquatic organisms
aquatic plant
aquatic toxicity
Arabian Sea
arable farming
arable land
archaeological site
architecture
Arctic
Arctic Ocean
Arctic protection
Arctic sea ice
area assessment
arid region
aromatic hydrocarbon
arsenic
arsenic compound
Art and Environment
arthropods