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Reports

A series of reports summarizing key findings from REPEAT Project analysis of proposed and recently enacted federal energy and climate policies.

Clean Investment in 2023: Assessing Progress in Electricity and Transport

A year and a half has passed since the Inflation Reduction Act (IRA) was signed into law, and more than two years since the enactment of the Infrastructure Investment and Jobs Act (IIJA). Using new data compiled by the Clean Investment Monitor, this report compares actual progress in 2022 and 2023 to projections from REPEAT Project and two other organizations whose assessments of the potential impact of the IRA and IIJA are widely used by policymakers and stakeholders. In this report, we take stock of progress in two key areas: the construction of new utility-scale clean electricity generation and storage capacity, and the sale of battery electric vehicles, plug-in hybrid vehicles, and fuel cell vehicles (referred to collectively as “zero emission vehicles” or ZEVs). This report is a joint product of the Clean Investment Monitor (from Rhodium Group and MIT's Center for Energy and Environmental Policy Research), Energy Innovation, and the REPEAT Project.
In a new joint analysis with Energy Innovation and the Rhodium Group, we compare on-the-ground investment progress in 2022 and 2023 with projections of the IRA's impact.

Climate Progress and the 117th Congress: The Impacts of the Inflation Reduction Act and Infrastructure Investment and Jobs Act

With the close of the 117th Congress in January 2023, REPEAT Project has completed a revised analysis of the climate and energy system impacts of legislation passed during this landmark session. This includes detailed analysis of the combined impacts of H.R. 5376, the Inflation Reduction Act of 2022 (IRA) and H.R. 3684, the Infrastructure Investment and Jobs Act of 2021 (IIJA). This report presents REPEAT Project’s revised findings on the impact of these laws on the energy system and greenhouse gas emissions trajectory of the United States. In this report, you will find results for greenhouse gas emissions, clean energy and electric vehicle deployment, fossil energy production and use, and more, along with estimated impacts on energy expenditures, capital investment, energy supply-related employment, air pollution, and public health.
Download REPEAT Project's latest analysis on the climate and energy system impacts of the Inflation Reduction Act and Infrastructure Investment and Jobs Act. (This version, July 5, 2023.)

Preview: Final REPEAT Project Findings on the Emissions Impacts of the Inflation Reduction Act and Infrastructure Investment and Jobs Act

With the close of the 117th Congress in January 2023, REPEAT Project has completed a revised, final analysis of the climate and energy system impacts of legislation passed during this landmark session. This includes detailed analysis of the combined impacts of H.R. 5376, the Inflation Reduction Act of 2022 (IRA) and H.R. 3684, the Infrastructure Investment and Jobs Act of 2021 (IIJA). This brief report previews REPEAT Project’s final revised findings on the impact of these laws on the greenhouse gas emissions trajectory of the United States. Stay tuned for our full report soon, which will detail a range of results including impact on greenhouse gas emissions, clean energy and electric vehicle deployment, fossil energy production and use, and more, along with estimated impacts on U.S. energy expenditures, capital investment, energy supply-related employment, air pollution, and public health.
Download this preview of REPEAT Project's revised, final analysis of the climate and energy system impacts of the Inflation Reduction Act and Infrastructure Investment and Jobs Act. (This version, April 12, 2023.)

Electricity Transmission is Key to Unlock the Full Potential of the Inflation Reduction Act

Previously, REPEAT Project estimated that Inflation Reduction Act could cut U.S. greenhouse gas emissions by roughly one billion tons per year in 2030. But that outcome depends on more than doubling the historical pace of electricity transmission expansion over the last decade in order to interconnect new renewable resources and meet growing demand from electric vehicles, heat pumps, and other electrification. This report assesses the role of electricity transmission in enabling the full emissions reduction potential of the Inflation Reduction Act (IRA).
Download this REPEAT Project Report on the importance of electricity transmission expansion to unlock the full emissions reduction potential of the Inflation Reduction Act. (This version, September 22, 2022.)

Preliminary Report: The Climate and Energy Impacts of the Inflation Reduction Act of 2022

Download the REPEAT Project's Preliminary Report for analysis of the energy system and climate impacts of the recently introduced Inflation Reduction Act of 2022. Learn how the bill cuts U.S. emissions by roughly 1 billion tons by 2030 and compare to previously introduced and enacted legislation. (This version, August 4, 2022.)

Summary Report: The Climate Impact of Congressional Infrastructure and Budget Bills

The Infrastructure Investment and Jobs Act (H.R. 3684) signed into law on November 15th contains billions of dollars for energy efficiency, electric vehicle charging, transmission networks, and historic investments in clean energy innovation. But how far will it cut U.S. emissions of greenhouse gases? What are the impacts of the Build Back Better Act (H.R. 5376) still pending in Congress? Will current policies put the United States on track to cut emissions 50% below peak levels by 2030 and net-zero by 2050?

Download the REPEAT Project Summary Report for details on the impact of recently enacted and pending policies on carbon dioxide emissions, clean energy and electric vehicle deployment, household energy costs, energy related jobs, air pollution and more. (This version, February 28, 2022.)

Preliminary Report: The Climate Impact of Congressional Infrastructure and Budget Bills

With Congress considering infrastructure and budget bills that would provide unprecedented public investments in clean energy infrastructure, clean vehicles, and other low-carbon solutions, the REPEAT Project is releasing this preliminary report on the national-scale impacts of the Build Back Better Act being considered in the House of Representatives (H.R. 5376, as reported by the Budget Committee on September 27, 2021) and the Infrastructure Investment and Jobs Act (H.R. 3684, as passed by the Senate on August 10, 2021).

Download the report for details on the impact of these pending policies on carbon dioxide emissions, clean energy and electric vehicle deployment, fossil energy use, and more. (This version, October 20, 2021.)

Addendum to Preliminary Report (11/12/21)

Since release of our "Preliminary Report: The Climate Impact of Congressional Infrastructure and Budget Bills," on October 20th, 2021, the U.S. House of Representatives passed the Infrastructure Investment and Jobs Act ( H.R. 3684 ) on November 6th and introduced a new version of the Build Back Better Act ( H.R. 5376, RCP 117-18 ) on November 3, 2021.


There are a significant number of changes to the Build Back Better Act, which the REPEAT Project has carefully documented along with a thorough catalog of all climate and clean energy provisions in the final Infrastructure Bill in this document.

This addendum to our preliminary report compiles emissions results from our original analysis of the Build Back Better Act (‘BBB 1.0’) as reported by the Budget Committee on September 27, 2021 but without the Clean Electricity Performance Program (the most substantive single change from BBB 1.0 to BBB 2.0) as well as our initial analysis of the Infrastructure Bill impacts.