Surely the sky should just be the sky. When it breaks free from the trees and buildings, that should be the end of artifice. Beyond the skyline, the sky and only the sky.

Yet the industrial growth society extends into the sky as well. A blue morning sky is riven with vapour trails. They point to business meetings in Brussels and deals in Dubai. Holidays in Hawaii and family gatherings in Finland.

I don’t mind these things but let me look up and be at peace as I gaze into the blue yonder. Let me look up at the heavens and marvel as my ancestors did.