| Efnisorð | Verk |
|---|---|
| Wastewater treatment | 1 |
| Water | 4 |
| Water framework directive | 1 |
| Water pollution | 1 |
| Water quality | 1 |
| Water systems | 1 |
| Water use efficiency | 1 |
| Waterbirds | 1 |
| Watergate hneykslið | 1 |
| Waters, John, 1946- | 1 |
| Water-power | 2 |
| Waymarks | 2 |
| Weather | 1 |
| Weather conditions | 3 |
| Weather forecasting | 5 |
| Weather prediction | 1 |
| Web portal | 1 |
| Web portals | 1 |
| Web search engines | 1 |
| Web servers | 5 |