| Rex Chainbelt | Rex Chainbelt: A Legacy of Innovation i… | Sustainable Water… |
| Reynolds number | Understanding Turbulence: The Role of R… | Sustainable Water… |
| RF/AS | RF/AS: A Powerful Duo for Wastewater Tr… | Wastewater Treatm… |
| RfD | Reference Dose (RfD): A Key Tool in Env… | Environmental Hea… |
| RFG | RFG: A Cleaner Fuel for a Healthier En… | Air Quality Manag… |
| RFP | RFPs in Environmental & Water Treatment… | Water Purification |
| RFQ | RFQ in Environmental & Water Treatment:… | Water Purification |
| RHA | RHA in Environmental & Water Treatment:… | Environmental Pol… |
| rheology | The Flow of Things: Rheology in Environ… | Sustainable Water… |
| rhizosphere | The Rhizosphere: A Hidden Hub for Envir… | Eco-Friendly Tech… |
| RHRS | Understanding RHRS: A Guide to the Revi… | Environmental Pol… |
| RibbonFlow | RibbonFlow: Revolutionizing Water Treat… | Water Purification |
| ribonucleic acid (RNA) | RNA: A Rising Star in Environmental & W… | Environmental Hea… |
| Richards of Rockford | Richards of Rockford: A Legacy of Innov… | Wastewater Treatm… |
| Rich Tech | Rich Tech: Elevating Environmental & Wa… | Water Purification |
| RI/FS | Cleaning Up the Mess: Understanding RI/… | Environmental Hea… |
| RIFS | RIFS: A Crucial Step in Environmental C… | Environmental Hea… |
| rift | Rifts: The Untamed Rapids of Environmen… | Sustainable Water… |
| RIGA | RIGA: A Legacy in Environmental and Wat… | Water Purification |
| Riga-Sorb | Riga-Sorb: A Powerful Tool for Water Tr… | Water Purification |
