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Vehicles are main source of Shanghai smog

EXHAUSTS from automobiles and boats contribute about 25 percent of the PM2.5 pollutants in the city, the Shanghai Environmental Protection Bureau said today as it announced that the city will adopt the PM2.5 air monitoring standard in June.

PM2.5 stands for airborne particles smaller than 2.5 micrometers, which are the main cause of urban smog and haze and are harmful to human health.

The bureau also said industrial activities account for 15 percent of the city's PM2.5 pollutants, industrial boilers 11 percent, power plants 10 percent, dust from construction sites and roads 10 percent, sandstorms from northern China 20 percent. The remaining 9 percent comes from kitchens, interior decorators, laundry shops, straw burning, spray fertilizers and livestock.

Analyzing the sources of PM2.5 pollutants can help the city better deal with the problem, said the bureau, adding that 10.3 billion yuan (US$1.63 billion) will be spent on 53 local air improvement projects in the next three years.

Shanghai will eliminate high-polluting vehicles and minimize industrial discharges by major enterprises to reduce PM2.5 pollutants that are small enough to lodge deep in the lungs and even enter the blood.

Currently, more than 200,000 high-polluting vehicles are still running on Shanghai's roads. Their emission level is 20 to 30 times that of new cars, the bureau said.

The government will expand areas which are off-limits to dirty vehicles, take 150,000 outdated vehicles off the roads by 2014, and adopt the stricter V5 national emission standard, equivalent to the Euro V standard, for new cars in 2013 as well as cleaner fuels.

Industrial boilers will be upgraded and a dust monitoring system will be installed at every large construction site. By 2014, the city will shut 2,000 outdated industrial projects which generate about 35 percent of PM2.5 particles in local air.


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