| Abbreviation | Definition |
|---|---|
| INRM | Integrated Natural Resource Management |
| INRP | L'Inventiare National des Rejets de Pollutants |
| INRR | INcident Response Resources |
| INT | Israel National Trail |
| INVEST | Investing in a New Vision for the Environment and Surface Transportation |
| IOC | In-Organic Contaminants |
| IOPCF | International Oil Pollution Compensation Funds |
| IOPP | International Oil Pollution Prevention |
| IOS | Internal Overflow System |
| IP | Ingress Protection |
| IPAT | Income Pollution Affluence Technology |
| IPCP | International Panel on Chemical Pollution |
| IPEN | International Pollutant Elimination Network |
| IPEN | International POPs Elimination Network |
| IPEP | Institute of Professional Environmental Practice |
| IPIR | Initial Pollution Incident Report |
| IPK | Industrial Park Krupina |
| IPM | Insect Prevention Management |
| IPMD | Integrated Pest Management Database |
| IPPC | Integrated Pollution and Prevention Control |