To control air pollution, you must first treat car exhaust
The Ministry of Environmental Protection's "Annual Report on China's Motor Vehicle Environmental Management (2017)" shows that China has become the world's largest country in the production and sale of motor vehicles for 8 consecutive years. Motor vehicle exhaust pollution has become an important source of air pollution in China. The important reason for photochemical smog pollution is the urgency of pollution prevention. In the next 5 years, more than 100 million motor vehicles will be added. Automobiles are the main contributors to urban air pollutants.
It is vitally important to pinpoint car exhaust pollution as the "main contributor" to air pollution. It turned out that the formation of smog, car exhaust, coal combustion, industrial emissions, etc., which is the main cause, has been controversial.
The annual report shows that the preliminary accounting of pollutant emissions from motor vehicles in the country last year was 44.725 million tons. Among them, carbon monoxide was 34.193 million tons, hydrocarbons were 4.220 million tons, nitrogen oxides were 5.778 million tons, and particulate matter was 534,000 tons.
"Cars are the main contributors to the total emissions of urban air pollutants. Their emissions of carbon monoxide and hydrocarbons exceed 80% and nitrogen oxides and particulate matter exceed 90%." This shows that automobile exhaust is not only the "front end" of air pollution control. ", Has actually settled in the" first "position.
The fact that China has entered the automotive era cannot be changed, and it is impossible to return to the past. China has been the world's largest motor vehicle production and sales country for 8 years, and most of our motor vehicles are fuel-powered vehicles, that is, vehicles using traditional fossil fuels. Moreover, due to technical constraints, under the condition that there is still a long distance for new energy vehicles to become the real main force of motor vehicles, gasoline or diesel used in a wide range of motor vehicles nationwide will still be the main fuel for vehicles for a long time to come. source. In this case, there is only one way to go, namely, while accelerating the transformation of motor vehicle fuel R & D, all measures must be taken to reduce motor vehicle exhaust emissions.
How to raise motor vehicle emission standards? How to strengthen the control of automobile exhaust emissions? How to establish a regulatory system for vehicle exhaust emissions in China? It is the problem that needs to be solved now.
Controlling automobile exhaust pollution is a very complicated systemic project, and every link cannot be relaxed. China has a vast territory and different developments in various regions. There are also a wide variety of motor vehicles. There are both new vehicles that meet emission standards, and old yellow-label vehicles that are facing elimination. We are facing the accelerated elimination of vehicles that do not meet emissions standards, and the regulation of this. And other issues. Therefore, in the research and development of clean engines, coordinating the relationship between various departments, formulating long-term industry development plans, and urban public transportation, clean fuel supply, etc., comprehensive measures must be taken to achieve the expected results.
Although China has initially established a new system for environmental management of motor vehicles, implemented a series of environmental management systems such as disclosure of environmental protection information for new production vehicles, environmental protection compliance supervision, and accelerated elimination of yellow-label vehicles and old vehicles, but there is no distance from environmental protection requirements. Small gap. In the past, the parties to the main sources of air pollution were arguing endlessly, and the answers given could not be unified due to the entanglement of the interests of the industry. In the end, this would definitely lead to the embarrassment of "everyone has responsibility and no one is responsible". Since it is found that vehicle exhaust is the main contributor to air pollution, it is necessary to carry out targeted work so that the right medicine can be targeted and targeted. Avoiding a one-size-fits-all or blind command in order to achieve sustainable economic overall development and let people Live up to the standard.
Air pollution, including smog, has brought about a great negative impact on China's production and life. Although the annual report showed that the preliminary accounting of pollutants emitted by motor vehicles last year was 44.725 million tons, a 1.3% reduction from 2015, but this is not enough to change the overall situation of air pollution in China. Of course, the causes of air pollution are very complicated, especially smog, which can only be formed under special weather conditions, and it is not just a problem of vehicle exhaust emissions. During special periods, PM2.5 in some cities also comes from soot, as well as construction machinery, agricultural machinery, small general machinery, ships, aircraft, railways, etc. in non-road mobile sources, which requires further observation and research in the future.
In any case, since it is confirmed that vehicle exhaust emissions are the main cause of air pollution, it is necessary to develop a set of measures as soon as possible to improve the original relevant regulations, standards, implementation, and supervision to reduce vehicle emissions to the greatest extent. Adverse effects on the atmospheric environment and the health of the people.
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