With the acceleration of society, industrialization and urbanization, the problem of environmental pollution is becoming more and more serious, among which air pollution has become one of the major environmental problems in the world. Air quality is not only directly related to people's health, but also affects the balance of ecosystem and economic development. Therefore, how to effectively control air pollution and realize air purification has become a topic of widespread concern in all walks of life. In this process, the application and development of environmental protection measures is particularly important.

1. Hazards of air pollution

Air pollution mainly comes from industrial emissions, automobile exhaust and construction dust. These pollutants include sulfur dioxide, nitrogen oxides, particulate matter (PM2.5), ozone and other harmful substances. Long-term exposure to polluted air will do harm to human respiratory system and cause asthma, chronic bronchitis and even lung cancer. At the same time, it will also have a negative impact on plant growth, leading to reduced crop production and destruction of natural ecosystems.

2. Air purification technology

Faced with the severe air pollution situation, governments of various countries and all walks of life have taken actions to develop and apply a series of air purification technologies:

Physical methods: such as electrostatic dust removal, filter net purification, etc., to achieve the purpose of purification by capturing or adsorbing particulate matter in the air.

Chemical method: use specific chemical reactions to remove harmful gases in the air. For example, catalytic converters can convert toxic components in automobile exhaust into harmless substances.

Biological method: planting green plants absorbs carbon dioxide and releases oxygen, and some microorganisms can also decompose some organic pollutants.

3. Promote environmental protection policies

In addition to adopting advanced technology, it is also crucial to strengthen the construction of environmental protection laws and regulations. Formulate strict emission standards, limit the development of highly polluting industries and encourage the use of clean energy; Increase the punishment for illegal sewage discharge and improve the environmental awareness of enterprises; Popularize public knowledge of environmental protection and advocate a low-carbon lifestyle.

4. The importance of public participation

Everyone is a participant in environmental protection. In our daily life, we can contribute by reducing private car trips and saving electricity and water. In addition, actively participating in afforestation activities and supporting the choice of green products and services are also effective ways to promote environmental improvement.

In a word, air purification and environmental protection are complementary. Only with the joint efforts of the whole society can we create a fresher and better living environment. Let's work together to leave a blue sky and green land for future generations!