Federal Letters

The U.S. Climate Alliance works to advance climate action across government through collective, targeted engagement with the federal government.

U.S. Climate Alliance Urges EPA to Uphold Facts, Science, and the Law

September 2025

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Letter | February 2026

The U.S. Climate Alliance submitted a letter to the U.S. Department of Transportation (DOT) urging it to withdraw the National Highway Traffic Safety Administration’s (NHTSA) proposal to substantially weaken fuel economy standards for light-duty vehicles under the Corporate Average Fuel Economy (CAFE) program.
U.S. Climate Alliance Urges U.S. DOT to Withdraw Proposal Weakening Fuel Economy Standards

Letter | August 2025

The U.S. Climate Alliance submitted a letter to the U.S. Environmental Protection Agency (EPA) urging it to withdraw its proposal to repeal carbon pollution standards against greenhouse gas pollution from fossil fuel-fired power plants.
U.S. Climate Alliance Urges EPA to Withdraw Harmful Power Plants Proposal

Letter | September 2024

The U.S. Climate Alliance submitted a letter to the U.S. Environmental Protection Agency (EPA) supporting timely approval of California’s waiver request for the Advanced Clean Fleets (ACF) regulation.
U.S. Climate Alliance Requests EPA Approval of California’s Advanced Clean Fleets Waiver

Letter | April 2024

The U.S. Climate Alliance submitted a letter to the U.S. Environmental Protection Agency (EPA) supporting California’s request for an authorization under the Clean Air Act (CAA) for the In-Use Locomotive Regulation (IULR).
U.S. Climate Alliance Requests EPA Approval of California’s In-Use Locomotive Regulation Authorization

Letter | February 2024

The U.S. Climate Alliance submitted a letter to the U.S. Environmental Protection Agency (EPA) supporting timely approval of California’s request for a waiver under the Clean Air Act (CAA) for the Advanced Clean Cars II (ACC II) regulation.
U.S. Climate Alliance Requests EPA Approval of California’s Clean Cars Waiver

Letter | August 2023

The U.S. Climate Alliance submitted a letter to the U.S. Environmental Protection Agency (EPA) supporting rapid finalization of strengthened power plant rules under section 111 of the Clean Air Act to curb greenhouse gas (GHG) emissions from new and existing fossil-fueled power plants.
U.S. Climate Alliance Supports Rapid Finalization of Strengthened Power Plant Rules

Letter | June 2023

The U.S. Climate Alliance submitted a letter to the U.S. Environmental Protection Agency (EPA) to urge the agency to finalize strengthened federal light- and medium-duty (LD+MD) and heavy-duty (HD) vehicle emission standards.
U.S. Climate Alliance Calls for Stringent Final Vehicle Emission Standards

Letter | February 2023

The U.S. Climate Alliance submitted a letter to President Biden outlining more than 20 specific actions the administration should take at the federal level to cut emissions across sectors, empower climate-leading states, advance environmental justice, increase resilience, lower energy costs, and speed our transition to a net-zero future.
U.S. Climate Alliance Recommends Federal Executive Actions to Speed America’s Net-Zero Transition

Letter | February 2023

The U.S. Climate Alliance submitted a letter to the U.S. Environmental Protection Agency (EPA) to support the inclusion and utilization of updated estimated values for the social cost of greenhouse gases (SC-GHGs), a key metric in assessing the true cost of climate damages.
U.S. Climate Alliance Encourages EPA to Update Social Cost of Greenhouse Gases Estimates

Letter | January 2023

The U.S. Climate Alliance submitted a letter to the U.S. Environmental Protection Agency (EPA) to provide input on the design and deployment of new Climate Pollution Reduction grants, made possible by the Inflation Reduction Act.
U.S. Climate Alliance Provides Input on Design and Deployment of EPA Climate Pollution Reduction Grants

Letter | August 2022

The U.S. Climate Alliance submitted a letter to the Federal Energy Regulatory Commission (FERC) to support the timely adoption of a final rule that establishes anticipatory long-term regional transmission (LTRT) planning designed to respond to the needs of a changing electricity grid.
U.S. Climate Alliance Supports Improved Long-Term Regional Transmission Planning from FERC

Letter | August 2022

The U.S. Climate Alliance submitted a letter to the U.S. Environmental Protection Agency (EPA) to strongly support approval of California’s clean trucks rule and urge EPA to grant California's request for a waiver under the CAA.
U.S. Climate Alliance Requests EPA Approval of California's Clean Trucks Waiver

Letter | June 2022

In a letter to congressional leaders, 22 U.S. Climate Alliance governors called for swift passage of a robust federal legislative package with the climate and clean energy investments.
U.S. Climate Alliance Calls on Congress to Pass Bold Climate and Clean Energy Package

Letter | June 2022

The U.S. Climate Alliance submitted a letter to the U.S. Environmental Protection Agency (EPA) to respond to EPA’s “Reducing Climate Pollution from New Gas-Fired Turbines” draft whitepaper and provide input on how these mitigation technologies can support a range of state and federal programs and efforts to reduce emissions from the electricity sector.
U.S. Climate Alliance Provides Input to EPA on Efforts to Reduce Climate Pollution from New Gas-Fired Turbines

Letter | May 2022

The U.S. Climate Alliance submitted a letter to the White House Council on Environmental Quality (CEQ) to provide feedback on the Climate and Economic Justice Screening Tool (CEJST), and to encourage CEQ to work even more closely with Alliance states in the refinement of this tool.
U.S. Climate Alliance Recommends Improvements to Administration’s Climate & Environmental Justice Screening Tool

Letter | September 2021

The U.S. Climate Alliance submitted letters to the White House Office of Management and Budget (OMB) and congressional leaders to highlight several common-sense changes to federal funding rules that will enable states with the greatest staffing, budgetary, and capacity constraints to effectively utilize — and therefore maximize the impact of — federal funding opportunities.
U.S. Climate Alliance Calls on OMB and Congress to Reform Federal Funding Rules

Letter | June 2021

The U.S. Climate Alliance submitted a letter to congressional leaders to urge swift passage of an ambitious infrastructure package centered around bold clean energy and climate investments that create high-quality jobs.
U.S. Climate Alliance Urges Congress to Pass Ambitious Infrastructure Package

Letter | July 2020

The U.S. Climate Alliance submitted a letter to congressional leaders to outline recommendations for federal COVID-19 emergency and relief efforts.
U.S. Climate Alliance Outlines Federal Stimulus Recommendations

Letter | April 2020

The U.S. Climate Alliance supports the American Innovation and Manufacturing Act of 2019 as it is currently written and strongly encourages congress to pass this bill as drafted, and work with states on swift and effective implementation.
U.S. Climate Alliance Written Testimony on S. 2754, American Innovation and Manufacturing Act of 2019

Letter | April 2019

The U.S. Climate Alliance has urged Secretary Perry and the U.S. Department of Energy to withdraw a proposed rule that dramatically weakens energy efficiency standards for general service lamps, which account for a significant percentage of Americans’ total electricity consumed.
U.S. Climate Alliance Urges the Department of Energy to Withdraw their Proposal to Weaken Energy Efficiency Standards for Light Bulbs

Letter | February 2018

The U.S. Climate Alliance sent a letter to leaders in the Senate and House Appropriations Committees requesting that Congress protect critical funding for renewable energy and energy efficiency research and development. Supporting energy innovation is essential to America’s energy transformation and our battle against climate change.
U.S. Climate Alliance Asks Congress to Protect Critical Funding for Renewable Energy and Energy Efficiency Research and Development

Letter | February 2020

The U.S. Climate Alliance responded to a Request for Information issued by the House Select Committee on the Climate Crisis and outlined how Alliance members can serve as a valuable resource in shaping an effective legislative climate framework.
U.S. Climate Alliance Details State-Led Climate Action to House Select Committee on the Climate Crisis

Letter | October 2018

The U.S. Climate Alliance sent a letter to the Department of Transportation (DOT) emphasizing the need for strong clean car standards that reduce vehicle pollution and improve efficiency to protect our health, environment and climate, while strengthening U.S. manufacturing competitiveness and creating American jobs.
U.S. Climate Alliance Defends Clean Car Standards
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