| Abbreviation | Definition |
|---|---|
| PETER | Performance Evaluation Tests for Environmental Research |
| PEU | Perceived Environmental Uncertainty |
| PEYA | Peel Environmental Youth Alliance |
| PF | Protection Forest |
| PFAS | Per- and polyFluoroAlkyl Substances |
| PFEE | Partnership for Environmental Education |
| PFMA | Pacific Fisheries Management Area |
| PFRP | Private Forest Reserves Program |
| PFSRB | Partners for the Saskatchewan River Basin |
| PFT | Private Forests Tasmania |
| PFWA | Palgrave Forest and Wildlife Area (Caledon, ON) |
| PGE | Produce Greenhouse Emissions |
| PGIS | Pollution Generating Impervious Surface |
| PGIS | Pollution Generating Impervious Surfaces |
| PGMD | Permeate Gap Membrane Distillation |
| PHA | Parks and Horticulture Authority |
| PHAT | Protecting Humans, Animals, and Trees |
| PHDTS | Pejabat Hutan Daerah Terengganu Selatan |
| PHEL | Public Health and Environmental Laboratories |
| PHWH | Primary HeadWater Habitat |