Why Dark Skies are Important
Over 90% of the UK population live under a severely light polluted sky (British Astronomical Association survey) and matters are getting progressively worse. Between 1993 and 2000 light pollution increased by 24%, the amount of truly dark night sky fell from 15% to 11% (CPRE Night Blight initiative).
This degradation of the quality of the night sky is apparent even in Wales. The satellite pictures below show the encroachment of light pollution from the south into the southern edges of the Brecon Beacons National Park.