| Term | Report | | Radiative forcing | GEO-7, GEO-1-6 |
| Radioactive nucleotides | GEO-7 |
| Re-usability | GEO-7 |
| Re-use | GEO-7 |
| Reach | GEO-7, GEO-1-6 |
| Recharge | GEO-7, GEO-1-6 |
| Recyclability | GEO-7, GEO-1-6 |
| Recycling | GEO-7 |
| Red list index | GEO-7, GEO-1-6 |
| Reduction potential | GEO-7, GEO-1-6 |
| Reference scenario | GEO-7 |
| Reforestation | GEO-7, GEO-1-6 |
| Refurbishment | GEO-7 |
| Regenerative agriculture | GEO-7, GEO-1-6 |
| Regulating services | GEO-7, GEO-1-6 |
| Relocation | GEO-7 |
| Remanufacturing | GEO-7 |
| Remote sensing | GEO-7, GEO-1-6 |
| Renewable energy source | GEO-7, GEO-1-6 |
| Repair | GEO-7 |
| Repair café | GEO-7 |
| Reproductive health | GEO-7, GEO-1-6 |
| Reservoir | GEO-7, GEO-1-6 |
| Residual emissions | GEO-7 |
| Resistance | GEO-7, GEO-1-6 |
| Reskilling | GEO-7 |
| Resource extraction | GEO-7 |
| Resource use efficiency | GEO-7 |
| Responsible mining | GEO-7 |
| Reverse logistics | GEO-7 |
| Reverse osmosis | GEO-7, GEO-1-6 |
| Riparian | GEO-7, GEO-1-6 |
| Riverine | GEO-7, GEO-1-6 |
| Run-off | GEO-1-6 |