Asked by Melanie Jackson from USA | Jun. 09, 2019 14:25
About:Air Pollution
Wondering if I will need a filtered face mask for China in October?
We will be traveling to Bejing, Shanghai, Xi’an and Chengdu the last half of October 2019. I have seen several sites with varying pollution indices, from 100-250 for these cities. So I’m wondering if a mask is best?
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