| Abbreviation | Definition |
|---|---|
| RIOS | Recycling Industry Operating Standards |
| RIPDES | Rhode Island Pollution Discharge Elimination System |
| RIS | Regulatory Impact Statement |
| RITS | Remediation Innovative Technology Seminar |
| RKD | Recycling Kontor Dual |
| RLEA | Ras Laffan Environmental Association |
| RLEP | Rappahannock League for Environmental Protection |
| RLP | Rain Leaches Pesticides |
| RMA | Return Material Authorization |
| RMEE | RITE Monitoring of Environmental Effects |
| RMRF | Residual Materials Recycling Facility |
| RNP | Renewable Northwest Project |
| RNV | Range of Natural Variation Ecosystem Classes |
| RO | Run Off |
| ROEE | Residential Outdoor Environmental Education |
| ROF | Reservoir Oil Fingerprinting |
| ROFA | Residual Oil Fly Ash |
| ROHS | Reduction Of Hazardous Substances |
| ROHS | Restriction of Hazardous Substances |
| RoHS | Restriction of Hazardous Substances (EU directive law) |