@CNN: India accounts for seven of the world’s 10 cities with the worst air pollution, according to a new report, but previously smogbound Chinese cities have seen a marked improvement https://t.co/3VaHrTbejg

@CNN: India accounts for seven of the world’s 10 cities with the worst air pollution, according to a new report, but previously smogbound Chinese cities have seen a marked improvement https://t.co/3VaHrTbejg