| Abbreviation | Definition |
|---|---|
| RUP | Restricted Use Pesticide |
| RUPES | Rewarding Upland Poor for Environmental Services |
| RVCA | Rideau Valley Conservation Authority |
| RVM's | Reverse Vending Machines |
| RWC | Rain Water Collection |
| RWCED | Real-World Challenges to Environmental Democracy |
| RWM | Recycling and Waste Management |
| RWRD | Recycling and Waste Reduction Division |
| RWTS | Recycling and Waste Transfer Stations |
| RWTT | Radioactive Waste Treatment Technology |
| SAD | Safely Allowed Drop |
| SADD | San Acacia Diversion Dam |
| SAE | Standard Aeration Efficiency |
| SAERT | Sustainable agriculture and environmental rehabilitation in Tigray |
| SAES | Saudi Asma Environmental Solutions |
| SAES | School of Agriculture and Environmental Sciences |
| SAES | Special Assistant for Environmental Services |
| SAF | Sustainable Aviation Fuel |
| SAFAR | System of Air Quality and Weather Forecasting And Research |
| SAGE | Safe, Active, Green, and Easy |