Air pollution ranking

In 2023, Jiuquan, Jiayuguan, Xianyang, Xi 'an and Luoyang were the top five cities in air pollution in June+10 in May 438.

Jiuquan, known as Suzhou in ancient times, is a prefecture-level city under the jurisdiction of Gansu Province. By 2020 1 October, 165438 governs1district, with 2 county-level cities and 4 counties, with a total area of192,000 square kilometers. According to the data of the seventh census, as of 0: 00 1 1 on June 2020, the permanent population of Jiuquan City was 1055706.

Jiuquan is located in the northwest of China, the northwest of Gansu Province and the west end of Hexi Corridor. It borders Zhangye City and Inner Mongolia Autonomous Region in Gansu Province in the east, Qinghai Province in the south, Xinjiang Uygur Autonomous Region in the west and Mongolia in the north. Since ancient times, it has been a traffic fortress leading to Xinjiang and the western regions, the cradle of modern space flight, the birthplace of new China petroleum industry and an important new energy base in China.

Causes of air pollution

The atmosphere is a mixture of nitrogen, oxygen, carbon dioxide, water vapor and solid impurity particles in a certain proportion. As far as dry air is concerned, in terms of volume, in the standard state, nitrogen accounts for 78.08%, oxygen accounts for 20.94%, rare gas accounts for 0.93%, carbon dioxide accounts for 0.03%, and other gases and impurities account for about 0.02%. Various natural changes often cause changes in atmospheric composition.

For example, when a volcano erupts, a large amount of dust, carbon dioxide and other gases are injected into the atmosphere, which causes the volcanic eruption area to be full of smoke and toxic gases. Large-scale forest fires caused by natural causes such as lightning will also increase the content of carbon dioxide and smoke particles.