| Abbreviation | Definition |
|---|---|
| REBS | Renewable Energy Buyback Scheme |
| REC | Recognized Environmental Condition |
| REC | regarding environmental contamination |
| REC | Regional Environmental Center |
| REC | Regional Environmental Council |
| REC | Renewable Energy Credit |
| RECB | Recent Environmental Change and Biodiversity |
| RECYCLE | Recycling |
| REDD | Reducing Emissions from Deforestation and Forest Degradation |
| REDP | Rural Energy Develpment Program(me) |
| REE | Reliability Efficiency and Environmental |
| REEC | Regional Environmental Enrichment Conferences |
| REEC | Riverina Environmental Education Centre |
| REGS | Resource Environmental Group Services |
| REHAC | Rollins Environmental Health and Action Committee (Emory University; Atlanta, GA) |
| REHIS | Rainingroyal Environmental Health Institute For Scotland |
| REHIS | Royal Environmental Health Insitute Of Scotland |
| REHIS | Royal Environmental Health Institute For Scotland |
| REHIS | Royal Environmental Health Institute Scotland |
| REHP | Registered Environmental Health Professional |