" On the north-western coasts of Britain and Ireland, the air has a remarkable transparency, for it is almost free of particulate matter. Little loose dust rises from the wet land, and the winds blow prevailingly off the sea. Through such air, photons can proceed without obstacle. The light moves, unscattered, and falls upon the forms and objects of those regions with candour. Standing within such a light, you feel thankful for its openness. There is a sense of something having been freely given, without its store having been diminished. "

― Robert Macfarlane , The Wild Places