In the 21st century, with the rapid development of economy and the acceleration of urbanization, environmental problems, especially air quality problems, have become increasingly prominent, which has become a major bottleneck restricting sustainable development. Faced with this challenge, many countries have explored air treatment models suitable for their national conditions, and there are many successful cases worth learning from. This paper will discuss several representative air treatment models from three dimensions: policy formulation, technological innovation and social participation, aiming at providing reference and enlightenment for China and other countries and regions.

First, policy guidance-protect the blue sky and white clouds with legal system

Germany is one of the leaders in the field of environmental protection in Europe and even in the world. The country has introduced a series of strict laws and regulations to regulate industrial emission standards, such as the implementation of the "cleanest technology principle", which requires enterprises to use the most advanced pollution control equipment in the production process; At the same time, a high fine mechanism was set up to severely crack down on excessive discharge. These measures have effectively curbed the development of heavily polluting industries and promoted the growth of clean energy and environmental protection industries.

Second, scientific and technological innovation-guarding fresh air with wisdom

With its strong scientific research strength, California is in the forefront of the world in the prevention and control of air pollution. The local government has worked closely with universities and enterprises to develop a variety of efficient air purification technologies and equipment, such as electrostatic precipitator and biological filter tower, which are widely used in automobile exhaust treatment and factory exhaust gas purification. In addition, big data analysis is also used to predict the changing trend of air quality and take countermeasures in advance to reduce the accumulation of pollutants.

Third, national action-let everyone contribute.

As the capital of China, Beijing has made remarkable achievements in improving air quality in recent years. This not only benefits from the large-scale governance project at the government level, but also depends on the active participation of the general public. Since 2013, the "I contribute to the blue sky" campaign has been held for many years, encouraging the public to reduce the frequency of private car trips, choose public transport or walk to work and school; Carry out garbage sorting and recycling to reduce the release of harmful gases produced by garbage incineration; Support the concept of green consumption, buy low-energy products and services and so on. These seemingly small but far-reaching behaviors converge into a powerful force, pushing the city towards a more livable and suitable direction.

In a word, "Environmental Protection Example of Air Governance Model" tells us that only when the government, enterprises and every ordinary citizen assume their responsibilities can we truly realize the beautiful vision of sky blue and clear water. In the future, under the background of globalization, cross-border cooperation will also become an indispensable part in solving regional and even global environmental problems. Let's work together to create a better tomorrow!