去年北京空氣PM2.5濃度下降了逾五分之一,冬季供暖季霧霾天大大減少,但其空氣汙染水準總是緊隨經濟規劃而變動。
Long renowned for its thick industrial haze, China’s capital has over the past few months enjoyed more frequent blue skies.
一向以籠罩著濃重的工業煙霧聞名的中國首都北京,過去幾個月享受著更頻繁到來的藍天。