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Sulfur content determines the degree of contamination of vehicle emissions, cities have to upgrade the oil standard. Yi Jing five, five countries difficult.

He Fang; Wang Xi

"East Fourth: 412μg / m3, the official Park: 384μg / m3, Nongzhanguan: 394μg / m3, Temple of Heaven: 335μg / m3 Old Town: 338μg / m3, Shunyi Metro: 417μg / m3, Huairou: 416μg / m3"

At 11:00 on January 29, Beijing time data from each monitoring site displays: the city nearly an hour average PM2.5 average breakthrough 350μg / m3, quality status is "serious pollution." Nearly 24 hours while Beijing Air Quality Index (AQI) reached 397.

This is the January 2013 smog fourth intrusion capital, Beijing released the same day haze yellow warning, expected in most areas will remain haze visibility less than 3000 meters. Continuous fog and haze of air pollution caused by such public discussion of the "pollution" of continuous fermentation. The network of "Sinopec refined oil sulfur content is 15 times that of Europe," saying the incident became netizens criticized the Chinese oil differential is strong evidence.

January 23, Beijing Environmental Protection Bureau announced: "State Council's approval, since February 1, 2013, Beijing took the lead in the country started the fifth stage of motor vehicle emission standards" that Beijing for the implementation of the new light-duty gasoline vehicles Beijing local standards (Beijing V emission standards). Since March 1, 2013, in Beijing to stop selling and registration does not meet the Beijing V emission standards for light-duty gasoline vehicles.