"Air, noise and water pollution have been high priority policy issues for decade, but light pollution remains scientifically, culturally and institutionally in the the dark" ...The Atlantic 2019
Light and dark are concepts deeply embedded in our cultural and genetic heritage. For a lot of people, it is hard to comprehend that light can have negative consequences. The past 150 years have witnessed an explosion of artificial lighting (man made illumination) that has seriously disturbed the predictable natural rhythm of day and night. The evolution of living organisms has been controlled by the natural cycle of light and dark. Since the introduction of electric light bulbs, anthropogenic light has disrupted this status quo with many adverse consequences, not only for humans but for animals and plants too.
The two main problems with artificial light are the excessive amount of light illumination and its colour spectrum. Urban centres are the regions where light pollution is the most serious. Urbanisation is a megatrend with a projected 70% of global population living in cities by 2050, and one expects that adverse effects of light pollution will continue to increase.
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