| Abbreviation | Definition |
|---|---|
| IDCE | International Design Center for the Environment |
| IDCF | Inter-Departmental Committee on Forestry |
| IDCS | International Data Collection System |
| IDDE | Illicit Discharge, Detection, and Elimination |
| IDEA | Inclusive Design and Environmental Access |
| IDEA | Intermittent Decanted Extended Aeration |
| IDEH | International Development Environmental Holdings |
| IDLH | Industrial Dust Lung Hazard |
| IDP | Immediate Disaster Protection |
| IDRM | Integrated Disaster Risk Management |
| IDsW | Information Desk standards Water |
| IDSW | International Dark Sky Week |
| IEA | Institute for Environmental Analytics |
| IEA | Institute for Environmental Assessment |
| IEA | International Environmental Agreements |
| IEAGHG | IEA Greenhouse Gas R&D Programme |
| IEAM | Integrated Environmental Assessment and Management |
| IEAP | Independent Environmental Advisory Panel |
| IEC | Industrial and Environmental Concepts |
| IEC | Information Education and Communication |