| Abbreviation | Definition |
|---|---|
| DEA | Department of Environmental Agency |
| DEAC | Durham Environmental Advisory Committee |
| DEAM | Data for Environmental Analysis and Management |
| DEAT | Department Environmental Affairs and Tourism |
| DEAT | Department of Environmental Affairs Tourism |
| DEC | DEME Environmental Contractors |
| DEC | Display Energy Certificates |
| DEC | Dynamic Environmental Corporation |
| DECM | Design for Environmentally Conscious Manufacturing |
| DECRM | Division of Environmental and Cultural Resources Mgmt |
| DECS | Department Of Environmental Conservation And Safety |
| DEE | Diplomate Environmental Engineer |
| DEEC | DuPont Environmental Education Center |
| DEEN | Drilling, Environment and Economics Network |
| DEEP | Detroit Environmental Enforcement Program |
| DEFA | Division of Environmental and Financial Assistance |
| DEG | Direct environmental growth |
| DEG | Division of Environmental Geosciences |
| DEGP | Delaware Estuary Grants Program |
| DEH | Department of Environmental Health |