Because it is a first-of-its-kind settlement that takes a basin-wide, systematic approach to addressing oil and gas emissions. The settlement also highlights how states and the federal government can collaborate to address air pollution from a significant sector in a commonsense way. It will also help spur development of advanced pollution control technologies that will become available to the entire industry. The other case I announced on Earth Day this year was an enforcement partnership with the state of Arkansas. ExxonMobil Pipeline Co. and Mobil Pipeline Co. (ExxonMobil) agreed to settle claims by the United States and the state of Arkansas stemming from the Pegasus Pipeline oil spill in Mayflower, Arkansas. The spill occurred after a pipeline, carrying Canadian heavy crude oil from Illinois to Texas, ruptured. Crucially, while the spill was localized to one community, the injunctive relief that ExxonMobil agreed to was company-wide.