Reports

Explore our library of reports below, assessing how key investment trends in clean technologies are evolving.

Clean Investment Monitor: Q2 2025 Update

In the second quarter of 2025, clean energy and transportation investment in the United States totaled $68 billion, a 0.3% decrease from the previous quarter, but a 1% increase from the same period in 2024. Clean investment accounted for 4.8% of total private investment in structures, equipment, and durable consumer goods.

Clean Investment Monitor: Q1 2025 Update

In the first quarter of 2025, clean energy and transportation investment in the United States totaled $67.3 billion, a 6.9% increase from the same period in 2024 but a 3.8% decrease from the previous quarter.

The State of US Clean Energy Supply Chains in 2025

Since the IRA's enactment, manufacturing has emerged as the fastest-growing segment of investment in clean energy technologies. We assess the state of supply chains for solar, wind, batteries, and electric vehicles.

Clean Investment Monitor: Q4 2024 Update

In the final quarter of 2024, clean energy and transportation investment in the United States totaled $70 billion, reflecting a slight 1% decline from the previous quarter but a 6% increase from the same period in 2023.

Clean Investment Monitor: Q3 2024 Update

Clean energy and transportation investment in the United States continued its record-setting growth in Q3 of 2024, reaching a new high of $71 billion.

Tallying the Two-Year Impact of the Inflation Reduction Act

As the United States approaches the two-year anniversary of the Inflation Reduction Act, this report provides a comprehensive analysis of actual investments in clean technologies and infrastructure since its enactment.

Clean Investment Monitor: Q1 2024 Update

Investment in manufacturing clean energy and transportation technology continued to be the main driver of clean investment and growth.

Assessing the EV Manufacturing Pipeline in the United States

The Biden administration’s recent decision to raise tariffs on imports of electric vehicles and batteries from China raises the question of how the levels of projected domestic EV and battery manufacturing capacity compare to projected demand.

Clean Investment Monitor: Q4 2023 Update

Clean energy and transportation investment reached a new high in Q4 of 2023, at $67 billion.

Clean Investment in 2023: Assessing Progress in Electricity and Transport

In new joint analysis with Energy Innovation and the REPEAT Project, we compare on-the-ground investment progress with projections of the IRA's impact.

Clean Investment Monitor: Q3 2023 Update

Investment in clean technologies is continuing at record levels in the United States, as demonstrated by new data from the third quarter of 2023.

Clean Investment at the Community Level

Community-level clean investment trends in the first year after passage of the Inflation Reduction Act

Tracking Decarbonization Technology in the United States

Clean energy is quickly becoming one of the largest industries in the U.S. In our inaugural report, we introduce the Clean Investment Monitor and highlight key trends in investments in emission-reducing technologies.