In June 2022, the U.S. Environmental Protection Agency proposed revisions to its greenhouse gas reporting program rule (GHGRP rule or rule). See 87 Fed. Reg. 36,920 (June 21, 2022). Established in 2009 following a Congressional mandate in the 2008 Consolidated Appropriations Act, the GHGRP rule requires large direct sources of greenhouse gas (GHG) emissions (e.g., with certain exceptions, sources emitting at least 25,000 metric tons of carbon dioxide equivalent), fuel and industrial gas suppliers, and carbon dioxide injection sites to report total annual GHG emissions and other information using specific calculation methodologies. See generally 40 C.F.R. Part 98. The rule requires reporting for over 40 different source categories, with more than 8,000 facilities reporting annually. According to EPA, the reported data cover covers 85% to 90% of the GHG emissions in the United States, and data collected under the program shows that Pennsylvania ranks among the top five states with the highest reported GHG emissions.