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white paper | March 2025
policy brief | November 2024
policy brief | September 2024
research report | September 2024
research report | August 2024
Moving Beyond the Colors: The Full Life-Cycle Emissions of Hydrogen Production Pathways for California

Timothy Lipman, Pablo Busch, Stephanie Collins, Arpad Horvath, Alissa Kendall, Daniel Coffee, Weilong (David) Kong

op-ed | September 2024
research report | September 2024
research report | April 2023
Zero-Emission Bus Implementation Guidebook for California Transit Fleets

Emily Rogers, Timothy Lipman

policy brief | September 2024
policy brief | September 2022
Hydrogen Can Have a Much Lower Carbon Intensity than Fossil Fuels But This Largely Depends on How It Is Produced and Distributed

Alissa Kendall, Arpad Horvath, Lewis Fulton, Pablo Busch, Stephanie Collins, Timothy Lipman

research report | September 2024
research report | October 2020
Carbon Neutrality Study 1:Driving California’s Transportation Emissions to Zero

Austin Brown, Bernadette Austin, Colin Murphy, Daniel Coffee, Elliot Martin, Gil Tal, Jean-Daniel Saphores, J.R. DeShazo, Juan Carlos Garcia Sanchez, Kelly Fleming, Lewis Fulton, Mark Delucchi, Marshall Miller, Michael Hyland, Susan Handy, Susan Shaheen, Timothy Lipman

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