smog at hazardous levels in shanghai - office air purifier

The Shanghai authorities have ordered the school children to stay indoors and stopped all construction work as the financial center in China suffered the worst air pollution and visibility dropped to dozens of metres, blurring
On Friday, the financial district was shrouded in yellow smog, with fewer people walking on city streets.
Due to government vehicles that the authorities have withdrawn from the roads, vehicle traffic has also decreased.
They also ban fireworks and firecrackers and stop all public sports events.
In local shops, protective masks and air purifiers sell beautifully.
"I think I live in smog," said Zheng Qiaoyun, a local resident who raised six people --month-Old son at home
"I have a headache, cough, and it's hard to breathe on my way to the office.
"Tiny harmful PM 2 concentrations in Shanghai.
5 capsules are 602.
Friday afternoon, 5 micrograms per cubic meter, the highest level of danger since the city began recording such data in last December.
Compared to the safety guidelines of the World Health Organization for 25 micrograms.
Dirty air in Shanghai and its neighboring provinces for several days is caused by coal burning, car exhaust, factory pollution and weather patterns, which clearly reminds us that pollution is a serious challenge in China.
Beijing, the capital, has seen several serious smog in the past year.
In the far northeast city of Harbin, some monitoring sites reported PM 2.
At the beginning of the winter heating season in October, the price per cubic meter was as high as 1000 micrograms.
As a coastal city, air pollution in Shanghai is usually mild to moderate, but the recent weather patterns have stalled the air in Shanghai.