With the rapid development of society, industrialization and urbanization, air pollution is becoming more and more serious, which has become a major obstacle to human health and social sustainable development. However, as early as the middle of the 20th century, people began to pay attention to and try to solve this environmental problem, which marked the initial formation of modern environmental protection consciousness.

First, early understanding and exploration

In 1943, a "photochemical smog" event shocked the world in Los Angeles, USA, which was the first time in the world to record a large-scale air pollution phenomenon caused by pollutants such as automobile exhaust. The incident caused thousands of people to develop respiratory diseases, and prompted the government and scientific research institutions to deeply study the causes of air pollution and its harm to human health. Since then, the lessons of the "Los Angeles Model" have been gradually valued by countries all over the world and become one of the important driving forces for the international community to strengthen air quality management and control.

Second, technological innovation and policy introduction

Since the 1960s, with the deepening understanding of the mechanism of air pollution and the progress of related science and technology, a series of technical schemes aimed at purifying the air and reducing emissions came into being. For example, the application of catalytic converter significantly reduces the harmful components in motor vehicle emissions; Using low-sulfur coal or natural gas instead of traditional fuel in industrial production can effectively reduce the release of acid gases such as sulfur dioxide. At the same time, many countries and regions have enacted strict environmental protection laws and regulations. For example, the United States promulgated the Clean Air Act in 1970, which set a good example for the subsequent air quality management around the world.

Third, public participation and social consensus

In addition to government-led efforts, ordinary people are paying more and more attention to improving the air quality in their residential areas. From the late 1980s to the early 1990s, with the popularization of green consumption concept and the reduction of technology cost, more and more families began to purchase household air purification equipment to ensure indoor air quality. In addition, all walks of life have raised citizens' awareness of environmental protection by holding various forms of public welfare activities and educational projects, which has promoted the whole society to participate in the prevention and control of air pollution.

To sum up, The Origin of Air Purification in Environmental Protection not only reflects the wisdom and courage of human beings in the face of natural challenges, but also highlights the great positive energy that can be generated by the combination of scientific and technological progress and humanistic care. In the future, under the background of global climate change, continuing to promote the innovation and optimization of air purification technology and management strategy will remain an indispensable key link to achieve the goal of ecological civilization construction.