| Abbreviation | Definition |
|---|---|
| PHWHI | Primary HeadWater Habitat Initiative |
| PIC | Pacific Island Country |
| PIC | Pollution Identification And Correction |
| PIC | Public Information Centre |
| PICK | Portable Interactive Conservation Kit |
| PICT | Pollution Induced Community Tolerance |
| PIELC | Public Interest Environmental Law Conference |
| PIPP | Pollution Incident Prevention Plans |
| PIRAP | Plastic Industry Recycling Action Plan |
| PIRATA | Prediction and Research Moored Array in the Tropical Atlantic |
| PISCES | Performance and Innovation in the SRF Creating Environmental Success |
| PITS | Pollution In The Streams |
| PL | Pollution Levels |
| PLEL | Pinchin LeBlanc Environmental Ltd |
| PLIA | Pollution Liability Insurance Agency |
| PLIRRA | Pollution Liability Insurance and Risk Reduction Act |
| PLRG | Pollution Load Reduction Goals |
| PLUARG | Pollution from Land Use Activities Reference Group |
| PMAC | Pest Management Advisory Committee |
| PMD | Prevent(stop) massive deforestation |