The study looked at how a coal-fired power plant affects the air quality nearby by releasing sulfur and nitrate. They tested the air around the plant for different pollutants like sulfur dioxide and particles. The plant was found to be a major source of sulfur dioxide in the area, with high levels measured downwind. The sulfur content in the coal burned at the plant was 3.5%, leading to high concentrations of sulfur dioxide in the air. This shows that coal-fired power plants can have a significant impact on local air quality by releasing pollutants like sulfur dioxide and nitrate.