@CNN: Here are the cities that face the most air pollution and the least air pollution, according to WHO data https://t.co/rbwQYvbbJK https://t.co/HkgBoqcoRu

May 1, 2018 / The Arbiter / CNN

@CNN: Here are the cities that face the most air pollution and the least air pollution, according to WHO data https://t.co/rbwQYvbbJK https://t.co/HkgBoqcoRu

Here are the cities that face the most air pollution and the least air pollution, according to WHO data https://t.co/rbwQYvbbJK pic.twitter.com/HkgBoqcoRu

— CNN (@CNN) May 2, 2018

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