![](https://www.klauseulenbach.de/wp-content/uploads/2018/03/KE51127-Pano-2500x1378.jpg)
Blue sky in a megacity that is usually known for strong air pollution. On this day, just before sunset, there wasn’t a hint of smog. A bird is enjoying the weather.
Blue sky in a megacity that is usually known for strong air pollution. On this day, just before sunset, there wasn’t a hint of smog. A bird is enjoying the weather.