Creator
- Rhode Island Greenways Council1
- Richards, F.1
- Richter, Bengt-Arne1
- Roberts, Henry, 1757-17961
- Roberts, J.1
- Robeson County Green Map Project1
- Rodriguez, Amanda1
- Roeloffzen, Anton1
- Rubio, Carlos A. Martinez1
- Sabatino, Mimi1
- Sense of Wonder1
- Shawe, William1
- Singapore Environment Council1
- Sturgis, William, 1782-18631
- Sustainable Calgary1
- Tait, John1
- Tennen Design Forum1
- Tiedeman, H. O.1
- Tolmie, William Fraser1
- Toma1