The Acid Rain Program 2004 Progress Report marks the 10th year of the US EPA Acid Rain Program. Major developments over the decade include advances in emission controls, improvements in program management, and electronic delivery of services. The report updates data reported in previous years, including:
- Sulfur dioxide (SO2) emissions, allowance market information, and program compliance;
- Nitrogen oxides (NOx) emissions and program compliance;
- Status and trends in acid deposition, air quality, and ecological effects; and
- Benefits and costs of the Acid Rain Program.