| Abbreviation | Definition |
|---|---|
| DESA | Dallas Environmental |
| DESD | Decommissioning and Environmental Sciences Division |
| DESD | Decommissioning Environmental Sciences Division |
| DESERT | Diversified Environmental Services Enterprise Retention and Technology |
| DESG | Dynamic Environmental Social Governance |
| DESP | Department of Environmental Science and Policy |
| DETP | Detailed Environmental Test Plan |
| DETS | Derwentside Environmental Testing Services |
| DETT | Danish Environmental Technology Transfer |
| DEWS | Delivering Environmental Web Services |
| DF | Decontamination Factor |
| DFF | Dependency on Fossil Fuel |
| DFLDG | Design Flow and Loading Determination Guidelines |
| DFO | Department of Fisheries and Oceans (government of Canada) |
| DGE | Diesel Gallon Equivalent |
| DGM | Dutch Ministry of Environment |
| DGR | Deep Geologic Repository |
| DGR | Deep Geological Repository, |
| DGW | Danger Global Warming |
| DHEC | Department of Health and Environmental Control |