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A-weighted sound pressure level
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Aalborg Charter
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Aarhus Convention
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abandoned farmland
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abiotic degradation
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abiotic factor
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abiotic raw material
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abrasion
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absorbent
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absorber
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absorption
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acaricide
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acceptable risk
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access to environmental information
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accident
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accident at work
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accidental release of organisms
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ACCOBAMS
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accompanying landscape conservation plan
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acetophenone
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acid
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acid rain
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acidification
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acidification of waters
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acidification potential
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acidity
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acoustic filter
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acoustic level
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acoustics
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Act on Combined Heat and Power Generation
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Act on Energy Services
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active monitoring
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active noise protection
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active pharmaceutical ingredient
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active substance
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adaptability
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adaptable species
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adaptation
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Adaptation Action Plan
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Adaptation Fund