The Benchmarking Air Emissions report evaluates publicly reported emissions data from the nation's 100 largest electric power producers. The latest rankings are based on 2015 data. Since that period, Exelon has added additional clean resources to its nuclear fleet, including acquisition of the James A. FitzPatrick nuclear energy plant in New York.Last year, Exelon received A- Leadership scores from the CDP (formerly the Carbon Disclosure Project) for disclosures in the three areas CDP measures - climate change, water use management and sustainable supply chain efforts. Exelon has been a leader in CDP disclosure performance for more than six years. Exelon has also been named to the Dow Jones Sustainability Index (DJSI) North America Index for 11 consecutive years. Exelon has also received other national and global recognitions for programs to incorporate clean energy, energy efficiency and smart grid technology as part of its strategy to build a sustainable and reliable next-generation energy grid. To learn more about Exelon's programs to protect the environment and enhance communities, read the Sustainability Report 2016. Exelon Corporation (NYSE: EXC) is a Fortune 100 energy company with the largest number of utility customers in the U.S. Exelon does business in 48 states, the District of Columbia and Canada and had 2016 revenue of $31.4 billion. Exelon's six utilities deliver electricity and natural gas to approximately 10 million customers in Delaware, the District of Columbia, Illinois, Maryland, New Jersey and Pennsylvania through its Atlantic City Electric, BGE, ComEd, Delmarva Power, PECO and Pepco subsidiaries. Exelon is one of the largest competitive U.S. power generators, with more than 32,700 megawatts of nuclear, gas, wind, solar and hydroelectric generating capacity comprising one of the nation's cleanest and lowest-cost power generation fleets. The company's Constellation business unit provides energy products and services to approximately 2.2 million residential, public sector and business customers, including more than two-thirds of the Fortune 100. Follow Exelon on Twitter @Exelon.