The researchers studied the emissions of harmful chemicals from a coal-fired power plant. They found that the gas phase had high concentrations of various volatile organic compounds (VOCs), with hydrocarbons being the most common. The top contributors were 1-hexene, n-hexane, and 2-methylpentane. The particle phase had lower VOC concentrations. The equipment used to control pollution had limited effectiveness in reducing VOCs. Aromatic hydrocarbons were the main contributors to ozone formation due to their high concentrations.