This week Shanghai has debunked Beijing as the city with worst air quality in China, with unprecedented levels of PM 2.5 density. Humidity, car and factory fumes and a cold front have been to blame for the current yellow haze that covers the city.
According to the U.S. EPA site, particulates less than 2.5 micrometers in diameter (PM 2.5) pose the greatest threats to health, since they can go deep into our lungs and even into our bloodstream.
The pollution is highly visible, and the smell in the air is distinct. Pedestrians and motorbike drivers can be seen wearing protective masks.
According to the Shanghai Air Pollution
Real-time Air Quality Index (AQI), the density levels of PM 2.5 in the past week have ranged from 200+ to 400+, the highest levels in the whole year.
Paper masks and ordinary surgical masks have no effect on PM 2.5 prevention.
N95 types of masks should be worn to prevent some of the consequences of fine particles.
Heavy smog at the financial district of Pudong in Shanghai, December 6, 2013
With permission by Reuters / Aly Song
Heavy smog at the financial district of Pudong in Shanghai, December 6, 2013
With permission by Reuters / Aly Song
A man wears two face masks while walking on a street during a hazy day in downtown Shanghai
With permission by Reuters / Aly Song
