| 1 | Web of Knowledge The ISI Web of Knowledge provides access to Thomson ISI's multidisciplinary databases of bibliographic information such as the Science Citation Index Expanded, Social Sciences Citation Index and the Arts and Humanities Citation Index | 605 |
| 2 | ScienceNet A free science information service, staffed by scientists who are expert in explaining complex topics in everyday language. Search the online database of previously answered questions, otherwise submit a question via e-mail. | 416 |
| 3 | Wildlife Help the wildlife in your garden with our range of products. | 328 |
| 4 | Scotland's Moorland Forum Moorland is a dynamic expression of wild nature, although much of it is managed by people; it is the epitome of a cultural landscape. Globally, heather moorland is virtually confined to Britain and Ireland. | 213 |
| 5 | Forensic Science Northern Ireland Executive Agency within the Northern Ireland Office. Includes profile, services and case studies. | 132 |
| 6 | Peatlands The Environment and Heritage Service explains what peatland is and describes its plants, wildlife, archaeology, history, and the uses of peat. Includes issues, conservation and places to visit. | 123 |
| 7 | BBC: Scotland the Wild A guide to animals and habitats from the makers of the TV series. Contains facts and images for hundreds of species, plus features, programme details, and the interactive program Wildlife Explorer. | 122 |
| 8 | The Loughs Agency Loughs Agency - Cross border Government Body aiming to provide effective conservation, management, promotion and development of the fisheries and marine resources of the Foyle and Carlingford Areas | 114 |
| 9 | Bio Northern Ireland Bionorthernireland - The portal for Life Science in Northern Ireland | 90 |
| 10 | EcoTech Exhibition and display centre based on sustainability. Information about the centre, the wind turbine, grounds and facilities. Details for visitors, and of conference services. Swaffham. | 88 |
| 11 | Pensychnant Nature Conservation Centre Details of events and photo galleries from this charity managing the Pensychnant nature reserve. | 88 |
| 12 | Dyfi Eco Valley Partnership A voluntary sector group promoting environmentally sustainable community regeneration in the Dyfi valley. Details of projects, local information and their philosophy of combining cultural, green and economic objectives. | 87 |
| 13 | Environment and Heritage Service Northern Ireland The government agency protecting and conserving the natural and built environment explains its responsibilities and activities. | 85 |
| 14 | The Tree Council Founded in 1974 to improve the environment in town and country by promoting the planting and conservation of trees and woods. | 82 |
| 15 | Living by the Loughshore Provides a guide to the province''s loughs. | 80 |
| 16 | Edinburgh International Science Festival Annual event in early April includes events and shows relating to science and technology. Features exhibitions, workshops, tours, talks, demonstrations and hands-on activities, all aimed at the general public. | 80 |
| 17 | The Shiant Isles All about the archaeology, geology, and natural history of the Shiant Isles in North West Scotland, in connection with the book ''Sea Room'' by Adam Nicolson, the owner of ths Isles. | 79 |
| 18 | Royal Society of Edinburgh The Royal Society of Edinburgh is Scotland's National Academy of Science & Letters. It is an independent body with charitable status. The Society organises conferences and lectures for the specialist and for the general public. It provides a forum for informed debate on issues of national and international importance. | 78 |
| 19 | The Environmental Research Institute A Thurso based facility capable of undertaking research activities. Information on education and training, facilities, research fields and staff is included. Contact addresses are also available. | 77 |
| 20 | Northern Ireland Semiconductor Research Centre Includes a who''s who, publication details, information on research opportunitites and relevant links. | 77 |