With the acceleration of society, industrialization and urbanization, the problem of air pollution has become increasingly serious, which has become one of the major obstacles restricting human health and social sustainable development. Air purification is not only related to each individual's quality of life, but also an important link to realize environmental protection and build a beautiful China. This paper aims to discuss the importance of air purification and its role as a "key apex" in the field of environmental protection.

1. Hazards of air pollution

Air pollution mainly comes from industrial emissions, automobile exhaust, construction dust and agricultural activities. These pollutants contain sulfur dioxide, nitrogen oxides, particulate matter (PM2.5/PM10) and other harmful substances, and their threat to human health should not be underestimated. People exposed to polluted air for a long time may have respiratory diseases, cardiovascular diseases and other problems, and even increase the risk of cancer. In addition, air pollution will adversely affect the growth of crops, thus affecting food safety and ecological balance.

2. Development of purification technology

Facing the severe air quality challenge, the progress of science and technology provides the possibility to solve this problem. At present, there are many air purification methods and technologies in the market, such as HEPA high efficiency filter, activated carbon adsorption, photocatalytic decomposition and so on. Among them, some emerging technologies, such as the application of nano-materials and biological purification, are also under constant research and development, showing broad application prospects.

3. Policy support and public participation

In addition to technological innovation, the introduction of relevant policies by the government is also an indispensable part of promoting air purification. For example, measures such as restricting the production of highly polluting enterprises, promoting the use of new energy vehicles and strengthening urban greening can effectively improve air quality. At the same time, it is equally important to raise citizens' awareness of environmental protection and encourage the public to adopt a low-carbon lifestyle. Everyone can contribute by reducing private car trips and saving energy.

4. Conclusion

In a word, air purification is an important part of environmental protection, and its importance is self-evident. It is not only an effective way to improve the quality of life of the people, but also lays a solid foundation for promoting the green transformation of the economy and society. In the future, with the joint efforts of the whole society, we are confident to overcome the air pollution problem, make the blue sky and white clouds become the norm, and jointly protect this beautiful home.