source https://www.cnn.com/2021/08/23/china/china-air-pollution-mic-intl-hnk/index.html
From 'air-pocalypse' to blue skies. Beijing's fight for cleaner air is a rare victory for public dissent
Beijing was once known as one of the world's most polluted cities, with dense smog and acrid air a daily reality for residents.
source https://www.cnn.com/2021/08/23/china/china-air-pollution-mic-intl-hnk/index.html
source https://www.cnn.com/2021/08/23/china/china-air-pollution-mic-intl-hnk/index.html