| Abbreviation | Definition |
|---|---|
| EFI | Environmental Fibers International |
| EFII | Environmental Finance and Impact Investing |
| EFII | Environmental Finance and Impact Investment |
| EFJ | ENVIRONMENTAL Foundation of Jamaica |
| EFO | Environmental Field Office |
| EFO | Environmental Field Offices |
| EFP | Environmental Fellows Program |
| EFPI | Environmental Footprint Performance Indicator |
| EFR | Environmental Facilities Review |
| EFR | environmental flow requirements |
| EFRC | Environmentally Friendly Road Construction |
| EFRD | Eco-Friendly Radiation Detector |
| EFRD | Environmental Facilities Review Division |
| EFSS | Environmental Field Sampling Study |
| EFW | Energy From Waste |
| EFWC | Eskasoni Fish and Wildlife Commission (Canada) |
| EGA | Environmental Goods Agreement |
| EGAD | Environmental and Groundwater Analysis Database |
| EGB | Environmental Green Bins |
| EGC | Environmental Growth Chambers |