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Lights out in Philadelphia!
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Each year hundreds of millions of birds die in the United States as a result of collisions with other or exterior structures. With this in mind, a collective of building owners in Philadelphia (eastern United States) made an important decision. During the migratory period, the owners of these skyscrapers will turn off the lights from midnight to 6 a.m. to protect the birds. Photo credit: Kelly Kiernan
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