National air quality ranking

The national air quality rankings are Lhasa, Kunming, Shenzhen and so on.

Lhasa 1

Lhasa, ranked first, is located at the highest altitude in China. There is no industrial pollution and no downtown prosperity, so her air quality is naturally excellent. In such a fresh city, people can easily breathe the freshest air and enjoy sunshine, nature and delicious food.

2. Kunming

Known as the "Spring City", Kunming has beautiful natural scenery and unique climatic conditions, and has now become one of the cities with good air quality in China.

3. Shenzhen

It is a famous special economic zone in China, and its performance in air quality is also very eye-catching, which fully shows the overall strength and humanistic charm of the city.

Factors affecting air quality:

Pollutant discharge and atmospheric diffusion capacity. Man-made pollutants from fixed and mobile pollution sources, including vehicle, ship and aircraft exhaust, industrial pollution, residents' living heating, garbage incineration, etc. When the pollution source is relatively stable, the diffusion, migration, flow and transformation of pollutants in the atmosphere are closely related to the meteorological conditions at that time, and meteorological factors such as wind direction, wind speed, inversion stratification and precipitation play an important role in the diffusion of pollutants.

Urban development density, topography and meteorology are also important factors affecting air quality. Urban development density, topography and meteorology are also important factors affecting air quality.