With the acceleration of industrialization and the advancement of urbanization, air quality has attracted more and more attention. Air pollution not only affects human health, but also causes serious damage to the ecological environment. Therefore, taking effective air purification measures, especially those that can improve air quality and have environmental protection characteristics, has become one of the urgent problems in today's society. This paper will discuss several main air purification measures and their environmental protection.

1. Plant purification method

Plants are natural "air purifiers" in nature. Through photosynthesis, plants can absorb carbon dioxide and release oxygen, and at the same time, they can absorb some harmful substances in the air, such as sulfur dioxide and nitrogen oxides. Increasing more green area and planting more trees with strong dust absorption ability in urban greening construction can not only beautify the environment, but also effectively improve urban air quality.

2. Ecological wetland technology

The interaction between aquatic plants and microorganisms is used to remove pollutants from sewage in ecological wetlands. This method is also applicable to the prevention and control of air pollution. By establishing artificial wetland or restoring natural wetland ecosystem, the harmful gases in the air can be degraded by using its complex biological chain structure, so as to purify the air. In addition, wetlands can also adjust the local climate, reduce the heat island effect and improve the quality of life of residents.

3. Green energy substitution

A large number of greenhouse gases and other toxic gases produced by fossil fuel combustion are one of the main reasons for the deterioration of air quality. Promoting the use of clean energy (such as solar energy and wind energy) instead of traditional fossil fuels and reducing pollutant emissions from the source are very important for long-term protection and improvement of air quality.

4. Microbial control technology

In recent years, scientists have found that certain kinds of microorganisms have strong ability to decompose organic pollutants. By cultivating these beneficial strains and applying them to the treatment of industrial waste gas, the harmful components contained in them can be removed to some extent, and the goal of air purification can be achieved. The method has the advantages of simple operation, low cost and no risk of secondary pollution, and has a high application prospect.

To sum up, adopting various environmental protection ways mentioned above for air purification can not only effectively reduce the environmental pollution problem, but also help promote the sustainable development of economy and society. In the future, with the support of policy guidance and technological progress, I believe we will explore more efficient and environmentally friendly air purification schemes.