| Abbreviation | Definition |
|---|---|
| NCCR | National Coastal Condition Reports |
| NCEC | National Center for Environmental Compliance |
| NCEE | National Center for Environmental Economics |
| NCEF | National Clean Energy Fund |
| NCEF | North Coast Energy Forum |
| NCEI | National Centers for Environmental Information |
| NCEL | National Caucus of Environmental Legislators |
| NCEP | National Centers for Environmental Prediction |
| NCEP | National Centre For Environmental Prediction |
| NCER | National Center for Electronics Recycling |
| NCER | National Center for Environmental Research |
| NCIS | National Contaminants Information System |
| NCPO | Navy Chemical Protective Overgarment |
| NCR | Nashville Conservation Reserve (Vaughan, Ontario) |
| NCRA | Northern California Recycling Association |
| NCRT | Norwich Carbon Reduction Trust |
| NCWRP | North Carolina Wetlands Restoration Program |
| NDC | Nationally Determined Contribution |
| NDC | Nationally Determined Contributions |
| NDCA | Nickel District Conservation Authority |