| Abbreviation | Definition |
|---|---|
| NEETC | National Environmental Education and Training Center |
| NEETC | National Environmental Education Training Center |
| NEEV | New Educational and Environmental Visions |
| NEIS | National Environmental Information Service |
| NELAP | National Environmental Laboratory Accreditation Program |
| NELC | National Environmental Law Center |
| NELP | Navy Environmental Leadership Program |
| NEMA | National Environmental Management Act |
| NEMC | National Environmental Monitoring Conference |
| NEMI | National Environmental Methods Index |
| NEMS | NOAA Environmental Modeling System |
| NEO | Navarino Environmental Observatory |
| NEO | New Environmental Optimisation |
| NEO | Northwestern Environmental Organization |
| NEON | National Ecological Observatory Network |
| NEPA | National Environment and Planning Agency of Jamaica |
| NEPA | National Environmental Policy Act of 1969 |
| NEPAD | The New Partnership for Africa Development |
| NEPI | National Environmental Policy Institute |
| NEPM | National Environment Protection Measure |