Shanghai Issues Health Warning on Heavy Pollution for Second Day
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Shanghai warned children and the elderly to stay indoors for a second day as haze engulfed the city, sending PM2.5 levels to more than 9 times the World Health Organization’s recommended exposure.
The air quality index was 280 as of 7 a.m., indicating “heavy pollution,” which is the third worst in a six-tier warning system, according to the website of the city’s environmental monitoring center. The PM2.5 pollutant reading was