| Abbreviation | Definition |
|---|---|
| PMEC | Peabody Mill Environmental Center |
| PMEL | Pacific Marine Environmental Laboratory |
| PMET | Pittsburgh Mineral Environmental Technology |
| PMFL | Private Managed Forest Land (Canada) |
| PMI | Particle Pollution |
| PNEA | Pacific Network for Environmental Assessment |
| PNEB | Publishers National Environment Bureau |
| PNEJ | Philippine Network of Environmental Journalists |
| PNEJ | Philippines Network of Environmental Journalists |
| PNSN | Parque Nacional Sierra Nevada |
| POEMS | Periodic Occupational and Environmental Monitoring Summary |
| POES | Polar Operating Environmental Satellite |
| POES | Polar Operational Environmental Satellite |
| POES | Polar Operational Environmental Satellites |
| POES | Polar Orbiting Environmental Satellites |
| POET | Protecting Our Environment Together |
| POF | Prevent Overfishing |
| POLREP | Pollution Report |
| POP | Persistent Organic Pollutants |
| POPP | Persistent Organic Pollutants and Pesticides |