30 times what the World Health Organization considers safe.
other paper said 70 times
7 Matching Annotations
- May 2018
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www.nytimes.com www.nytimes.com
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www.bbc.com www.bbc.com
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Chinese
another highly populated city
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factories do not follow pollution-control measures
can use for my topic
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that's so much higher then it should be
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could have changed by now
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3 years ago info could have changed
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huge population
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