Stalker was interested in claims by forester Peter Wohlleben that city lighting is harming trees, and that trees need darkness to rest.
A former government forest ranger in Germany Mr Wohlleben’s views are so controversial that Germany’s forestry officials have launched a petition against his book The Hidden Life of Trees.
The idea that trees have a circadian rhythm which is disrupted by light pollution, which stresses their bio-systems is not that off the wall!
