What is the weather like in Beijing?

Expert: Fog and haze are two different weather phenomena. The formation of fog is mainly related to the moisture content in the air, and the relative humidity is generally above 95%. Haze is mainly formed by suspended particles in the air, which is mainly caused by three factors: first, the increase of static wind in the horizontal direction is not conducive to the diffusion and dilution of atmospheric pollutants; Second, there is an inversion in the vertical direction, and the vertical movement of air is limited, so it is difficult for pollutants to drift to high altitude and be blocked at low altitude and near the ground; The third is the increase of suspended particles in the air, such as dust, automobile exhaust and coal-fired emissions.

Haze occurs in winter, which is the peak period of coal-fired heating in the north. Beijing environmental protection department said that coal, motor vehicles, industry, dust and other pollution sources are the root causes of the serious smog weather pollution.

In fact, the persistent smog weather has not only affected Beijing. According to the national urban air quality real-time release platform, the monitoring data of some monitoring stations in 33 cities across the country exceeded 300, that is, the air quality reached serious pollution.

According to industry insiders, 80% of PM2.5 pollution in China is related to energy, and more than 70% of greenhouse gases are related to the burning of fossil fuels. Therefore, to solve environmental problems, we must first start from two aspects, control the total energy and adjust the energy consumption structure.

Experts say that the root cause of the smog problem is related to the industrialization stage of the country. China is in the middle and late stage of industrialization and the accelerated stage of urbanization. The industrial development path of high input, high consumption and high emission over the years has aggravated air pollution. In the long run, in order to reduce the emission of pollutants, especially polluting gases, it is necessary to change the energy structure dominated by coal and minimize the use of fossil energy such as coal and oil.

Zhou Rong, director of Greenpeace Climate and Energy Project, believes that the high incidence and aggravation of PM2.5 pollution in recent years is directly related to the rapid growth of coal consumption. The adjustment of energy structure is imminent. First of all, it is necessary to control the total amount of regional coal, especially in the eastern urban agglomeration where PM2.5 is already overwhelmed. Zero growth control of coal consumption should be carried out immediately, and cities with conditions should reduce coal consumption.

The data show that for a long time, coal accounts for about 70% of China's total primary energy production and consumption, and the annual consumption of nearly 4 billion tons of coal has brought unbearable weight to the environment.