Air quality legislation refers to laws and regulations designed to protect the environment and public health by controlling pollution in the air. These laws set limits on harmful substances, such as carbon monoxide, sulfur dioxide, and particulate matter, which can cause serious health issues. Governments create these regulations to ensure that industries and vehicles reduce their emissions, promoting cleaner air for everyone. In many countries, agencies like the Environmental Protection Agency (EPA) in the United States enforce air quality standards. They monitor air pollution levels and can impose penalties on those who violate the laws. By implementing air quality legislation, communities can work towards a healthier environment and improve the quality of life for their residents.