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Data Driven Energy & Climate Policy Evaluation

Compiled by the Princeton ZERO Lab to put granular analysis in the hands of policy makers, media and the general public.

The REPEAT Project provides regular, timely, and independent environmental and economic evaluation of federal energy and climate policies as they’re proposed and enacted. From Congressional legislation to proposed regulations and executive actions, the REPEAT Project provides a detailed look at the United States’ evolving energy and climate policy environment and the country’s progress on the road to net-zero greenhouse gas emissions.

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Our Reports

A series of reports summarizing key findings from REPEAT Project analysis.

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

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.)
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Policy Evaluation

Dive into the details on each federal policy.

The Build Back Better Act, November 2021 version ('BBBA, Nov ‘21')

Savings for Avg US Household
On 2030 Annual Energy Costs
2.2 Million
Net Jobs Created
In Energy Supply Related Industries
Deaths Avoided From Pollution
Through 2030

Passed by the U.S. House of Representatives on November 19, 2021, the Build Back Better Act (H.R. 5376) contains over $500 billion in tax credits, grants, rebates, and other policies to deploy clean electricity, electric vehicles, building electrification and efficiency, hydrogen, carbon capture and storage, and low-carbon transportation fuels. The bill also funds agricultural practices that could sequester carbon in soils, provides funding to fight wildfires and protect forests, and imposes a fee on upstream emissions of methane in oil and gas sectors. It remains stalled in the U.S. Senate at this time.

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The Build Back Better Act, September 2021 version ('BBBA, Sept ‘21')

1.4 Billion
Tons Reduction
In 2030 GHG Emissions
2.5 Million
Net Jobs Created
In Energy Supply Related Industries
Deaths Avoided From Pollution
Through 2030

The original version of the Build Back Better Act, introduced in September 2021 (H.R. 5376, H. Rept. 117-130), contained a broader range of policies to deploy clean energy and energy efficiency than the final bill passed the House in November 2021. This scenario helps track how the bill evolved from initial introduction to final passage in the House and the impact of legislative changes made during negotiations over the bill.

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The Infrastructure Investment and American Jobs Act of 2021 ('IIJA')

1.3 Billion
Tons Short
Of 2030 Climate Goals
0.2 Million
Net Jobs Created
In Energy Supply Related Industries
Reduction in Energy Use
By 2030

This bipartisan infrastructure investment bill (H.R. 3684) passed the House and Senate and was signed into law in November 2021. The law makes major investments in surface transportation, including rail and public transit, and climate resilient infrastructure. It also supports expansion of electricity transmission and CO2 pipeline networks, funds building weatherization and EV charger stations, and invests in demonstration and early deployment of a range of advanced energy technologies.

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