| ABP | Agence Bruxelles Propreté–Net Brussel |
| AECM | Agri-environment-climate measures |
| AIU | Areas intended for urbanisation |
| ANB | Flemish Agency for Nature and Forests |
| BCR | Brussels-Capital Region |
| BPNS | Belgian part of the North Sea |
| BRPCE | Brussels Regional Programme for a Circular Economy |
| CAP | Common Agricultural Policy |
| CBD | Convention on Biological Diversity |
| CITES | Convention on International Trade in Endangered Species of Wild Fauna and Flora |
| CO | Carbon monoxide |
| CO2 eq | Carbon dioxide equivalent |
| CoDT | Territorial Development Code |
| DMC | Domestic material consumption |
| EIA | Environmental impact assessment |
| ELV | End-of-life vehicle |
| ETS | Emissions Trading System |
| EU | European Union |
| FPB | Federal Planning Bureau |
| FPSHFCSE | Federal Public Service Health, Food Chain Safety and Environment |
| GDP | Gross domestic product |
| GHG | Greenhouse gas |
| INM | Integrated nature management |
| IRPC | Inter-regional Packaging Commission |
| IUCN | International Union for Conservation of Nature |
| LEZ | Low emission zone |
| LULUCF | Land use, land-use change and forestry |
| MPA | Marine Protected Area |
| MSP | Marine Spatial Plan |
| NBS | National Biodiversity Strategy |
| NECP | National Energy and Climate Plan |
| NER | Nutrient emission right |
| NGO | Non-governmental organisation |
| NMP | Nature management plan |
| NMVOC | Non-methane volatile organic compounds |
| NO2 | Nitrogen dioxide |
| NOx | Nitrogen oxide |
| NPSI | National Pact for Strategic Investment |
| NVZ | Nitrate vulnerable zone |
| OVAM | Public Waste Agency of Flanders |
| PAHs | Polycyclic aromatic hydrocarbons |
| PAYT | Pay-as-you-throw |
| PFS | Public financial support |
| PM10 | Particulate matter smaller than 10 microns in diameter |
| PM2.5 | Particulate matter smaller than 2.5 microns in diameter |
| PRO | Producer responsibility organisation |
| RBD | River Basin District |
| RBMP | River Basin Management Plan |
| R&D | Research and development |
| RD&D | Research, development and demonstration |
| RDP | Rural Development Programme |
| REB | Brussels Ecological Network |
| RIA | Regulatory impact assessment |
| RSV | Spatial structure plan |
| RUP | Spatial implementation plan |
| SDGs | Sustainable Development Goals |
| SEA | Strategic environmental assessment |
| SEP | Main ecological structure |
| SFM | Sustainable forest management |
| SOx | Sulphur oxide |
| SPA | Special protection areas |
| SPW | Wallonia Public Service |
| TPES | Total primary energy supply |
| UAA | Utilised agricultural area |
| UNFCCC | United Nations Framework Convention on Climate Change |
| VAT | Value added tax |
| VEN | Flemish Ecological Network |
| VLM | Flemish Land Agency |
| VOC | Volatile organic compounds |
| WEEE | Waste electrical and electronic equipment |
| WFD | Water Framework Directive |
OECD Environmental Performance Reviews: Belgium 2021
