Title IV (Acid Rain Program)

Title IV of the Clean Air Act, known as the Acid Rain Program, was established to reduce acid rain, which harms the environment and public health. It primarily targets emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) from power plants, as these pollutants contribute to acid rain. The program uses a cap-and-trade system, allowing companies to buy and sell allowances for emissions. This system encourages efficiency and innovation, helping to lower pollution levels while maintaining economic flexibility. As a result, it has significantly reduced acid rain, benefiting ecosystems and improving air quality across the United States.