The Transparency and Honesty in Energy Regulations Act of 2025 prohibits federal agencies from using the "social cost of carbon" and other greenhouse gas cost estimates in making regulatory decisions, cost-benefit analyses, or other agency actions. The social cost of carbon is a method federal agencies have used to estimate the economic damage caused by greenhouse gas emissions and incorporate those costs into policy decisions. This bill effectively bars all federal agencies from considering these estimates when developing new rules, issuing guidance, or taking regulatory action. Within 120 days of enactment, agencies must report to Congress on how many rules and actions since 2009 have relied on these greenhouse gas cost estimates. The bill also requires agencies to use only environmental considerations explicitly required by federal law and to follow 2003 Office of Management and Budget guidance when evaluating environmental impacts, potentially rolling back decades of climate-related regulatory analysis.
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