As we all know, Shanxi is a big coal-producing province, and Linfen is also a place rich in coal resources. The structure of heavy industry with coal and coke iron as the main industrial chain not only creates great economic value, but also produces serious environmental pollution. A large number of small coal mines are mined and dug indiscriminately without safety guarantee. Therefore, coal ash pollution is serious, and coal ash is everywhere in the air and water. Local residents joked that they suffocated in coal dust almost every night.

Anhui Tianying (Source: Data Map)

Tianying County is the center of lead production in China, but the mining of lead ore has caused serious pollution to the local environment. Tianying is also one of the eight most polluted cities in China. The concentration of air and soil is 8.5- 10 times higher than the national health standard, and the local agricultural dust index is 24 times higher than the health standard. You can imagine the consequences of living in such an environment for a long time.

Wanshan, Guizhou (Source: Data Map)

Wanshan is located in the east of Guizhou Province, bordering on Hunan Province. It is the "mercury mine capital" of China, and its mercury production accounts for about half of that of China. By the time 200 1 mine was closed, a large amount of solid waste, including roasting slag and waste rock, had been produced. Due to long-term mining and smelting in mines, mercury pollution in the whole environment is serious. The mercury content in soil is 2 ~ 3 orders of magnitude higher than the national average. There is also obvious mercury accumulation in local vegetation, crops and animals.

Mercury is a highly toxic heavy metal. Inhaling too much mercury can lead to heavy metal poisoning. During the period of 1953- 1956, a famous mercury poisoning incident occurred in Minamata disease in Japan. Patients will become inarticulate, dumbfounded, trembling hands and feet, and insane. If these patients are not cured for a long time, they will bend over and die tragically.

It is foggy in Jincheng, Lanzhou, Gansu Province, and it is blurred when standing by the Yellow River (source: data map)

Lanzhou is an old industrial base. Industrial wastewater, smoke and dust, automobile exhaust and natural dust are the main pollution sources in Lanzhou.

Lanzhou is mainly polluted by floating dust in spring and mud dust in summer and autumn. After winter, due to a large number of coal heating, smoke pollution is very serious. On March 17, 2009, Lanzhou, Gansu Province continued to suffer from polluted weather, and there was a phenomenon of "smog". Although it was sunny that day, the visibility was very low, and the whole city seemed to be shrouded in a huge gray curtain. The pollution index was as high as 500 at one time, which was a serious pollution, and it was the first worst polluted weather in that year.

Urumqi, Xinjiang (Source: Data Map)

Urumqi, Xinjiang is a typical winter soot pollution city in northern China. Due to the special terrain and climate factors, Urumqi has a heating period of up to half a year every winter, so it is deeply harmed by air pollution. Pollution sources such as smoke, dust and automobile exhaust have become the main sources of air quality in Urumqi. June 5438+ 10 is one of the most serious months of air pollution in Urumqi, and the pollution index often exceeds 500.