| ngo/npo sector | 60 |
| commercial | 54 |
| research | 37 |
| International | 36 |
| networks | 34 |
| renewable energy | 31 |
| activities & projects | 26 |
| united states | 19 |
| magazines | 12 |
| journals | 12 |
| banking & investment | 12 |
| research centers | 11 |
| idiom | 11 |
| visualization | 8 |
| other | 8 |
| ecoresearch | 8 |
| government | 7 |
| it services | 7 |
| environment | 6 |
| ecomonitor | 6 |
| online databases | 6 |
| community | 4 |
| conferences & workshops | 3 |
| Sustainability | 3 |
| corporate sustainability | 3 |
| climate change | 3 |
| departments | 3 |
| web | 3 |
| australia | 3 |
| grid computing | 3 |
| media | 2 |
| communication | 2 |
| knowledge-management | 2 |
| cause-related shopping | 2 |
| text mining | 2 |
| facebook | 2 |
| web2.0 | 2 |
| environmental communication | 2 |
| news | 2 |
| geospatial | 2 |
| wiki | 1 |
| semanticweb | 1 |
| idiom | 1 |
| canada | 1 |
| environment | 1 |
| multimedia | 1 |
| sustainability | 1 |
| mobility | 1 |
| books | 1 |
| partnership | 1 |