What are the main methods of reducing air pollutants?

1. Improving automobile emissions: The use of catalytic converters, clean fuel technologies, and regular vehicle maintenance can help reduce emissions from cars and other forms of transportation.

2. Increasing energy efficiency: Using energy-efficient appliances, insulating buildings, and promoting renewable energy sources can help reduce emissions from power plants and other sources of energy production.

3. Implementing stricter regulations: Laws and regulations that set limits on emissions from industrial sources, as well as monitoring and enforcement of these regulations, can help reduce air pollutants.

4. Promoting sustainable practices: Encouraging sustainable agriculture, forestry, and urban planning practices can help reduce emissions from these industries and activities.

5. Encouraging public transportation: Increasing the use of public transportation and other alternative forms of transportation can help reduce emissions from cars and other vehicles.

6. Planting trees: Trees absorb carbon dioxide and other pollutants from the air, making them a natural way to reduce air pollution.

7. Using air purifiers and filters: In indoor spaces, using air purifiers and filters can help reduce indoor air pollutants.

8. Promoting green building practices: Using green building materials and techniques can help reduce emissions from construction and maintenance activities.