Life on earth is based on the day-night rhythm. But the periods of natural darkness are becoming shorter and shorter due to the use of artificial light sources. This is not without consequences for humans and the environment.
Until relatively recently, the open flame was the only known means of illumination used by humans that, apart from the moon and stars, brought light into the darkness of the night. The first bright outdoor lighting systems finally came into use about 150 years ago – first in cities, then in the countryside. Large-scale artificial lighting extended or postponed working hours and leisure activities well past the end of the day.
Source: Krone
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