The Clean Air Act is a U.S. law designed to improve air quality and protect public health. It sets standards for air pollutants, such as carbon monoxide and sulfur dioxide, and requires states to develop plans to meet these standards. The Act aims to reduce harmful emissions from vehicles, factories, and other sources, ensuring cleaner air for everyone. Since its passage in 1970, the Clean Air Act has led to significant improvements in air quality across the country. It has helped decrease the levels of dangerous pollutants, benefiting both the environment and public health. The Act is a vital tool in the fight against air pollution.