In recent years, there are fewer and fewer foggy days in Beijing. How is it managed?

I can't see the dog when I walk it. I can't leave until the dog barks at me. This joke should be familiar to everyone. This is the true portrayal of the smog in Beijing that year. In Beijing at that time, in autumn and winter, every household closed its doors and windows to block out a little air. Don't forget to wear a mask when you go out.

It can be said how serious the smog in Beijing was. When people mentioned Beijing in those years, the first thing foreigners thought of was not the 2008 Olympic Games or the capital of China, but the terrible smog. At the height of the smog, the Olympic Committee even proposed that the 2008 Olympic Games be held in other cities. Some neighboring countries even left the air quality of the capital to Beijing.

? How harmful is smog? Fog and haze can directly or indirectly cause many diseases. Can cause acute rhinitis and acute bronchitis. It is easy to induce acute attack of cardiovascular disease. The activity of infectious bacteria in the air has increased, and infectious diseases have increased. It is also easy to cause traffic jams and traffic accidents. Affect people's physical and mental health.

The influencing factor of smog in Beijing is that many aspects of smog are not caused by any single factor. The country needs to develop and the city needs to develop, so Beijing must experience such a situation. Historically, both Britain and Germany have experienced smog, and it is only a matter of time before fast-developing countries encounter smog. This is a process that every country must go through in its development.

? Haze is caused by various atmospheric humidity and dust concentration in the air, such as PM 10, PM2.5, etc. Atmospheric visibility is directly proportional to atmospheric humidity and inversely proportional to dust concentration in the atmosphere. All the cities with excellent air quality in China are coastal cities. The air quality in Tianjin is better than that in Beijing, and the high air humidity in coastal cities is the main reason.

Another main reason is motor vehicles, coal burning, heavy industry and dust emissions. As the political center of China, Beijing has a large number of motor vehicles. In this way, there will definitely be engines that fail to pass the annual inspection, and the nitrogen oxides produced by internal combustion engines cannot be well treated. When it is directly discharged into the air, it will cause pollution.

2065 438+03-2065 438+06 How to control the smog in Beijing? The average annual concentration of PM 2.5 in Beijing is 73g/m3, a record low. In 20 18, the average annual concentration of inhalable particulate matter in Beijing was 5 1 μ g/m3, which was 42.7% lower than that in 20 18. Nowadays, smog has rarely been mentioned by people.

The strictest clean air action plan in history introduced Beijing's emission reduction measures, with unprecedented strength. According to official data, since Beijing declared war on PM2.5 in 20 13, the city has eliminated 40,000 steam boilers, implemented 52,000 low-nitrogen transformation of steam gas boilers, scrapped 2,265,438 old motor vehicles, promoted more than 200,000 new energy vehicles and eliminated 2,648 polluting enterprises.

There is basically no coalification in the plain area, and more than 1. 1 0,000 enterprises with scattered accounts were classified and disposed of. Among them, the total amount of some tasks completed is about the sum of the past 10 years. Treat every link with the strength of treating serious illness. Do everything possible to reduce coal consumption and improve clean combustion technology and technology.

Advocate new energy, clean energy, photovoltaic, wind power, hydropower, biomass energy and even clean nuclear energy to replace traditional energy. It can reduce the emission of particulate matter. Improve the technical level, increase the popularization rate, strictly legislate, give priority to industrial environmental protection, and vigorously reduce excessive polluting industries.

Regional coordinated emission reduction has played a vital role. Beijing-Tianjin-Hebei and its surrounding areas have become "one", and joint prevention and control and coordinated emission reduction must be unswervingly strengthened. 20 18 By 2020, Hebei Province will complete the relocation or closure of 40 key polluting industrial enterprises in cities. High-pollution and high-emission enterprises in Tianjin have also been shut down. There are not many pollution sources around Beijing.

With such strong strength, determination, strict policies and various pollution control measures, it is inevitable to improve the air and environment in Beijing, and it is also necessary to present a relatively good air quality level now.

Of course, it doesn't mean that Beijing's air pollution doesn't need to continue to be treated; This does not mean that Beijing should applaud now; But it can let people see the hope that Beijing's urban area will truly become a green mountain.