| Abbreviation | Definition |
|---|---|
| ALD | Arid Lands Development |
| ALLW | Alpha-contaminated, mixed, Low-Level Waste |
| ALSF | Aggregates Levy Sustainability Fund |
| AMA | Active Management Area |
| AMAP | Arctic Monitoring and Assessment Program |
| AMD | Acid Mine Drainage |
| AMD | Air Monitoring Directive |
| AMEP | Assessment and Management of Environmental Pollution |
| AMESS | Autonomous Machine Environmental Surveillance System |
| AMI | Ambient Intelligence |
| AMRC | Association of Municipal Recycling Coordinators |
| AMRD | Abbotsford Mission Recycling Depot |
| AMSI | ARBA Minch Solar Initiative |
| AMU | Adjusted Mitigation Unit |
| ANCI | Associazione Nazionale Calzaturifici Italiani |
| ANEP | Association of National Estuary Programs |
| ANGRY | Anti-Nuclear Group Representing York |
| ANSI | Area of Natural and Scientific Interest |
| ANWAR | Alaska National Wildlife Arctic Reserve |
| ANWR | Alaska National Wildlife Refuge |