Chicago skyline on April 20, 2017. Chris Favero / CC BY-SA 2.0
By Dipika Kadaba
The amount of artificial lighting is steadily increasing every year around the planet. It's a cause for celebration in remote villages in Africa and the Indian sub-continent that recently gained access to electricity for the first time, but it is also harming the health and well-being of residents of megacities elsewhere that continue to get bigger and brighter every year.
Health impacts of this artificial illumination after daylight hours range from depression to cancer, including a range of sleep disorders.