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Anonymous users2024-02-07As we all know, the formation of smog is mainly caused by the massive use of coal, unreasonable industrial structure, automobile exhaust, industrial dust, etc. In fact, the formation of haze and greenhouse gas emissions are two sides of a problem, China's main energy is coal, oil, natural gas and other fossil fuels, especially when coal-based, a large number of carbon dioxide emissions are generated, according to statistics, in 2012 China's carbon dioxide emissions are about 8 billion tons, accounting for a quarter of the world. While greenhouse gases make global warming, they also produce haze and fine particulate matter, which have an adverse effect on human health.
Therefore, the reduction of CO2 emissions is the reduction of fine particulate matter, which is a good thing for environmental improvement.
On the issue of the time frame for tackling smog, the first thing is to legislate. In 1948, when there was severe smog in the United States, it was even more serious than in China. This was followed by legislation over a period of four or five years to improve the environment.
The London smog incident in Britain in 1952 also took four or five years to legislate and improve. In the past two years, China has seen a smog problem, and the environmental protection department has also enacted legislation, but China has a big difficulty, that is, 70% of China's energy endowment is dependent on coal as the main energy source, which is difficult to overcome in a short period of time. "The control of haze weather depends on the changes in the energy structure, the changes in the industrial structure and the joint efforts of all the people.
So, I can't tell you how many years we need, but I think 30 years is too long, three or five years is not realistic, we need a certain historical period. ”
Secondly, the study of the regional diffusion of haze should be strengthened, the atmosphere is very mobile, and a series of chemical reactions will occur when moving, and small particles will gradually form slightly larger particulate matter, which will settle down and decrease. However, when pollution emissions are widespread in this area, and the weather conditions in this area are very consistent, such as relatively humid and calm weather, most of the area will experience haze weather. At present, there are four smog areas in China:
Beijing-Tianjin-Hebei, Pearl River Delta, Yangtze River Delta, Sichuan Basin. When taken together, it reached an area of 2 million square kilometers at its peak last year. Therefore, smog is not only generated by itself, but also by regional interactions.
It must be improved by adjusting the industrial structure and changing the energy endowment. Even if coal can't be converted into other clean energy sources soon, it must be made clean before it can be used, and clean energy should be used in large quantities. At the same time, relying on scientific and technological strength to reduce energy consumption per unit of GDP. ”
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