Summary | Cities in the Beijing-Tianjian-Hebei region saw
better air quality in April compared with the same period last
year, while cities in the Yangtze River delta and Pearl River
delta experienced a decline in air quality.
better air quality in April compared with the same period last
year, while cities in the Yangtze River delta and Pearl River
delta experienced a decline in air quality.
chinadaily.com.cn | 05 September 2015