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Shanghai air heavily polluted this morning

Shanghai's air is heavily polluted this morning with air authority issuing a warning for people to limit their outdoor time.
Heavy pollution is the second-worst rating in the six-level air quality system.
Local air was heavily polluted with the PM2.5 reading reaching about 210 micrograms per cubic meter at 9am today, according to real-time data released by the air quality monitoring watchdog. And the hourly reading remained about the same at 10am and 11am.
The PM2.5 density number nearly triples that of the country's national limit. China's national standard requires the PM2.5 density be kept below the daily average of 75 micrograms per cubic meter.
PM2.5 particles, which are less than 2.5 micrometers in diameter, have gained increasing attention for their impact on visibility and people's health.


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