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U

uchelwydd, 11:7

UK Phenological Network, 2:21-2

Ulcerous Dermal Necrosis, 9:18

UN Framework on Climate Change, 33:15

Undeb Ewropeaidd, 8:41; 17:44

Understanding Welsh Place Names by Gwili Gog, 40:42

UNESCO, 33:18-21(c)

University

   Aberystwyth, 19:18

   Bangor, 21:31; 31:21

   Bournemouth, 25:6,7

   Swansea, 25:12

unusual sightings, of marine species, 34:40

uplands, 5:20; 6:6; 25:38; 29:20; 35:22

   farming, 2:7

   grazing on, 1:4

   restoration, 16:32-34

Upper Conwy catchment, 29:23

urban clutter, 31:15

urban nature, 10:9ff; 27:43

Usk, River, 39:31-32; 40:45

Uwch-gynhadledd y byd ar ddatblygiad cynaliadwy, 9:42