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Chicago at night. Thomas Hawk / Flickr

An estimated 600 million birds are killed every year from collisions with some of the country's largest skyscrapers, according to research from the Cornell Lab of Ornithology. Particularly deadly are those tall buildings found in three cities in particular.

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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.

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EcoWatch Daily Newsletter

Photo credit: NASA's Goddard Space Flight Center/Kathryn Mersmann

NASA scientists created the most complete map of Earth at night to date—showing humans in all of their electric glory. But, while the photos are magical, they also show human's extreme effect on the planet.

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