By Michael Marshall
LIGHT pollution is now so bad that a dull orange “skyglow” obscures the stars in more than two-thirds of the world’s crucial habitats. And we have almost no idea how this affects wildlife.
There are two kinds of light pollution. The first is the intense brightness close to artificial lights like street lights, which often means night-time cities are lit up like Christmas trees, and we know a lot about its effects on nature.
But further from cities, although there is less bright light, there …
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