Home » Clean Air Blog » Air Pollution » A $3 Billion Pollution 'Solution' in Delhi - But Will It Work? A $3 Billion Pollution ‘Solution’ in Delhi – But Will It Work? 2020/7/152016/6/14 作者 Bhumi Purohit 哇！此内容没有中文版。点击这里快去看英文版！ 你知道这些吗？ Directly Comparable Tests: DIY vs Blue Air DIY Filter Compared to Expensive Filters For Delhi’s Traffic Police, More Air Means More Problems 冠状病毒期间，北京空气污染水平上升了17%
