| BISI | Bulgarian International Services and Investments |
| CEE | Central and Eastern Europe |
| CEELI | Central and Eastern European Law Initiative |
| EA | Environmental Analysis |
| EEC | European Economic Community (now European Union) |
| EBRD | European Bank for Reconstruction and Development |
| EIA | Environmental Impact Assessment |
| EIS | Environmental Impact Study |
| EIB | European Investment Bank |
| ELNI | Environmental Law Network International |
| EU | European Union |
| GDF | General Directory of Forestry |
| GEF | Global Environmental Facility |
| HELCOM | Helsinki Commission |
| IPPC | Integrated Pollution Prevention Control |
| IFI | International Financing Institutions |
| IUCN | World Conservation Union (International Union for the Conservation of Nature and Natural Resources) |
| MoE | Ministry of Environment |
| MP(s) | Member(s) of Parliament |
| METAP | Mediterranean Environmental Technical Assistance Program |
| NAFTA | North American Free Trade Agreement |
| NGO | Nongovernmental organization |
| PHARE | (Original) Poland-Hungary Assistance to Restructure the Economy; under the name PHARE, other countries are now also involved |
| PIC | Public Information Center |
| PID | Project Information Document |
| PPNEA | Association for the Preservation and Protection of Natural Environment |
| PSD | Project Summary Document |
| REC | Regional Environmental Center for Central and Eastern Europe |
| SAR | Staff Appraisal Report |
| TACIS | Technical Assistance for the Commonwealth of Independent States |
| TENs | Trans European Networks |
| UN-ECE | United Nations Economic Commission for Europe |
| UNDP | United Nations Development Program |
| UNEP | United Nations Development Program |
| WWF | World Wide Fund for Nature |
| World Bank | International Bank for Reconstruction and Development |