With the accelerated development of industrialization and urbanization, the problem of air pollution has become increasingly prominent, which has become one of the major obstacles restricting sustainable development. The differences in air purification technology and policy implementation between different regions and countries have led to a significant "gap" in air quality, which not only affects human health, but also aggravates the global environmental inequality.

First, the difference in technology investment leads to the disparity in purification capacity

Developed countries have invested heavily in the research and development of air purification technology due to their strong economic strength, and have advanced filtration technology and equipment, which can effectively reduce the concentration of harmful substances such as PM2.5; However, due to financial and technical constraints, it is difficult for many developing countries to introduce or independently develop high-efficiency air purification devices, which makes residents in these areas exposed to high-concentration pollutants for a long time and face greater health risks.

Second, uneven enforcement of laws and regulations leads to differentiation of governance effects

In addition to hardware facilities, there are obvious differences in the design and implementation of environmental protection legal systems among countries. Western countries such as Europe and America have generally established strict emission standards and forced enterprises to reduce pollution emissions through legislative means; In contrast, although some Asian and African countries have also issued relevant laws and regulations, in the actual operation process, due to insufficient supervision, the policy implementation is not in place and the expected emission reduction targets cannot be achieved.

Third, the level of public awareness determines the depth of participation

Finally, the general public's awareness of the importance of air quality is also one of the important factors that affect the effectiveness of purification in various places. In some areas with better social and economic conditions, people pay more attention to the quality of living environment and are willing to make efforts to improve air quality, such as choosing public transportation and supporting green energy projects. In other places, there may be a lack of sufficient environmental awareness and social mobilization due to low education level or information occlusion, which hinders the overall governance process.

To sum up, The Environmental Protection Gap of Air Purification Gap reveals a complicated and severe fact-although all mankind is facing the challenges brought by air pollution, there is an obvious imbalance in coping ability and willingness to act among countries and regions. To solve this problem, the international community needs to strengthen cooperation, share advanced experience and technological achievements, and at the same time, pay attention to improving the comprehensive national strength and development level of underdeveloped areas, fundamentally narrow this gap, and realize the right to fair breathing on a global scale.