MassiveIndustry

(Tue, 11 Dec 2018) Annual U.S. electric power industry emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) have declined by 88% and 76%, respectively, between their peaks in 1997 and 2017. During this period, coal-fired generation was responsible for 90% of SO2 emissions and 76% of NOx emissions from the U.S. electric power industry. Among other factors, declining coal-fired generation and implementation of environmental regulations under the Clean Air Act Amendments (CAAA) of 1990 have both contributed to the decrease in electric power industry SO2 and NOx emissions.