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City issues smog alert as PM2.5 reading climbs
By Cai Wenjun |
January 23, 2013, Wednesday
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Online Edition
Online Edition
SHANGHAI has moderate air pollution today due to hazy weather and the Shanghai Environmental Monitoring Center issued a smog alert at 7:52am.
The city's PM2.5 level began to rise last night and reached 170 micrograms per cubic meter by 7am. The center urged people with cardiovascular and respiratory problems, seniors and children to avoid staying outdoors too long.
At 10am, the city's average PM2.5 reading dropped to 155.2 micrograms per cubic meter, but its 24-hour average was 133.5 micrograms, still above the national limit of 75 micrograms. PM2.5 is a gauge of airborne particles smaller than 2.5 micrometers in diameter.
The center said the smog will linger in the city whole day today under the current meteorological conditions.
The city's PM2.5 level began to rise last night and reached 170 micrograms per cubic meter by 7am. The center urged people with cardiovascular and respiratory problems, seniors and children to avoid staying outdoors too long.
At 10am, the city's average PM2.5 reading dropped to 155.2 micrograms per cubic meter, but its 24-hour average was 133.5 micrograms, still above the national limit of 75 micrograms. PM2.5 is a gauge of airborne particles smaller than 2.5 micrometers in diameter.
The center said the smog will linger in the city whole day today under the current meteorological conditions.
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