The reporter was informed that about two-thirds of the 113 cities in the first half of this year have emitted nitrogen dioxide, showing an upward trend. Among them, Jinzhou's emissions increased by 100% year-on-year.

Ministry of Environmental Protection Minister Zhou Shengxian disclosed on September 27th that the scheduled "nitrogen-oxygen compound" during the "Twelfth Five-Year Plan" period was to drop by 10%, but actually the emissions in the first half of this year actually rose by 6.17%, with the annual planned emission reduction targets and "Twelve "The goals set by the plan are very different.

The reporter also learned that the current emissions of nitrogen oxides are mainly emitted by motor vehicles, power plants and industrial enterprises, each accounting for approximately 1/3 of the total. Among them, the emissions of motor vehicles occupy an important proportion in big cities. To this end, relevant departments proposed to implement pilot proposals for the control of the total amount of motor vehicles in cities with a total population of over 10 million to change the situation of rising air pollution indicators such as nitrogen oxides.

In the first half of this year, the nation’s nitrogen and oxygen emissions increased by 6.17%, which is a significant gap from the annual reduction of 1.5% and the cumulative reduction of 10% in five years.

For example, in the first half of Sichuan, nitrogen and oxygen emissions increased by 9.95%, Henan increased by 7.4%, Jiangxi increased by 9.69%, Shaanxi increased by 7.63%, and these areas were to reduce emissions by 6.9%, 14.7%, and 6.9 during the “12th Five Year Plan” period respectively. There is a big gap between % and 9.9%. Xinjiang Construction Corps even increased by 12.56%.

The reasons for this are related to the increase in vehicle ownership, the virtual plant denitrification device, and the relative lag in the elimination of backward production capacity by industrial enterprises.

Take Shaanxi as an example. In 2010, the emission of nitrogen oxides from motor vehicles in Shaanxi was about 160,000 tons, which accounted for 21% of the total nitrogen oxide emissions in the province. In the first half of 2011, the number of motor vehicles in the province reached 4.95 million, an increase of 38.3% over the same period of last year. In the first half of this year, 260,000 new motor vehicles were registered, and its new nitrogen oxide emissions accounted for 25% of the total new volume.

The reporter was informed that there are other more important reasons for the rise in nitrogen oxides. Power plants and industrial companies are not interested in denitrification. Compared with the current price of denitrification, the power plant is more willing to pay fines.

According to calculations, an annual operation fee of more than 40 million kilowatts for a denitrification unit with a capacity of 1 million kilowatts, and a sewage treatment fee for nitrogen oxides is only 6 million yuan. The phenomena that electricity companies prefer to pay sewage charges without running denitrification facilities are widespread.

An expert from the Atmospheric Department of the Environmental Planning Institute of the Ministry of Environmental Protection pointed out that even if the denitrification tariff is implemented, “the reduction of nitrogen oxide emissions in the country will take time, because the denitration plant will take time to start production”, the person said.

The “limited car” range or the expanded reporter was informed that the relevant environmental protection agencies have already proposed cities with a population of more than 10 million to implement pilot methods for the regulation of the total amount of automobiles in order to achieve the emission reduction targets of nitrogen oxides.

Up to now, Beijing and Guiyang have begun implementing the automobile purchase restriction policy, which is similar to the proposal of controlling the total amount of automobiles.

It is understood that the current population of more than 10 million cities are Beijing, Shanghai and Chengdu. However, most of the nitrogen oxides in municipalities and provincial capitals are rapidly increasing.

Take, for example, nitrogen dioxide, the main component of nitrogen oxides, as an example. In the first half of this year, except for a few cities such as Chongqing, Haikou, Shenyang, Tianjin, and Jinan, the emissions of nitrogen dioxide have been reduced. Most of them are in an increasing trend. Some third-tier cities, such as Jinzhou, have even increased their emissions by 100%.

In this regard, the automotive industry expert Jia Xinguang believes that the purpose of reducing emissions through the control of the total number of vehicles, but also strengthen individual models. As far as motor vehicles are concerned, emissions of nitrogen oxides are severe, mainly bus buses and large trucks that burn diesel.

If it is necessary to implement total control of automobiles and reduce pollution emissions, “particularly in terms of reducing the emission of nitrogen oxides from the automotive side, the most important thing is to accelerate the elimination of unqualified vehicles, increase emission standards, and set emission standards from the current state as soon as possible. The third is to improve the country's five," Jia Xinguang said.

At present, domestic automotive NOx emissions account for 31% of the total emissions, of which only 5% of heavy-duty diesel vehicles have a total emission of 74%. Therefore, heavy-duty diesel vehicles are the focus of future emission reduction control.

As of now, only Beijing, Shanghai and the Pearl River Delta region implemented the National IV emission standards and corresponding oil standards in advance in 2008, 2009 and 2010 respectively. However, as far as the whole country is concerned, the supply of gasoline, diesel and diesel fuel for the National 3 and 4 countries is relatively backward.

The director of the Vehicle Emissions Laboratory at the Chinese Research Academy of Environmental Sciences, Yue Xin, told reporters that every time a new fuel standard is upgraded, a large proportion of nitrogen oxide emissions will be reduced. The key is that there is no higher standard gasoline.