Nearly twenty buildings in Philadelphia are dimming their lights this spring after thousands of birds perished in the city's largest mass collision in recent history.
원문출처 : https://www.cnn.com/2021/05/19/us/philadelphia-skyline-dimming-birds-collision/index.html
원문출처 : https://www.cnn.com/2021/05/19/us/philadelphia-skyline-dimming-birds-collision/index.html