animal waste
animal welfare
Animal Welfare Act
animal welfare law
animals for slaughter
annelid
annual limit value
Anopheles
anorganic raw material
ant
ant control
antagonistic effect
Antarctic ecosystem
Antarctic ice sheet
Antarctic Ocean
Antarctic research
Antarctic tourism
Antarctic Treaty
Antarctica
anthraquinone
anthropocene
anthropogenic climate change
anthropogenic influence
antibiotic
antibiotic resistance
antifouling
antifouling agent
antimicrobial
antimycotic
AOT40
AOX value
apparel textiles
applied science
approval
approval of installations
aquaculture
aquaculture production
aquaponics
aquatic animal
aquatic ecology