Linfen (临汾 - Línfén), Shanxi Province
The city of Linfen is one of the protocapitals of ancient China, environmental anti-record of our time of turning of the garden city into one of the dirtiest places in the world and, since recently, the best starting point for a trip to the Hukou waterfall.
If you google the information about the city, it turns out that the vast majority of pages are all possible ratings of the most polluted places on the planet, where Linfen necessarily occupies one of the lines. Even some 35 years ago it was called "The modern city of fruits and flowers", but the change in the economic policy of China demanded an increase in energy resources. Rapid development of coal chemical industry has started. This led to the fact that for two decades the ancient garden city of Linfen has become a center of the coal industry of China. The glory of pure springs, quality and efficient agriculture that remained for 40 centuries became a thing of the past.

The Chinese authorities are aware of the environmental problems. In recent years at least a dozen coal-fired thermal power plants stopped operation. Hundreds of mines, including illegal ones, were closed. In villages they introduce a system for water heating using solar energy, and implement measures to reduce the use of coal. A lot of attention is paid to landscaping the city, which is very noticeable.
Naturally I did not make a chemical analysis of air, but the smog here was not visually different from the smog that hangs over Taiyuan or Beijing. I believe that the Chinese will do it, and once again Linfen will become a garden city with blue sky, where it is easy to breathe.

Pingyang – is the name of the ancient capital, which was in place of Linfen during the time of Emperor Yao (尧 - Yáo).
(XXIV century BC.)