Should California Subsidize Out-of-State Biofuels or In-State Electric Vehicles?
Kleinman Center for Energy Policy (Dec. 3, 2024)

Why Did the Clean Development Mechanism Produce Low-Quality Carbon Offsets?
Kleinman Center for Energy Policy (Sept. 11, 2024)

Will Carbon Offsets Under the Paris Agreement Be Different?
Kleinman Center for Energy Policy (Sept. 4, 2024)

Global Energy Experts at Penn Respond to G7 Coal Phase Out 
Kleinman Center for Energy Policy (May 2, 2024)

Gavin Newsom is Weaker on Climate When the Cameras Aren’t Rolling
Heatmap News (Nov. 2, 2024)

A cap on oil and gas emissions would make Canada’s climate pledge credible
The Hill Times (July 7, 2023)

Get tax right or clean hydrogen will be bigger boondoggle than biofuels
The Washington Post (Apr. 27, 2023) (with Gernot Wagner)

The SBTi net-zero standard should include guidance on carbon removal
CarbonPlan (Nov. 22, 2022) (with Zeke Hausfather, Freya Chay, and Jeremy Freeman)

Verra’s broadside against the Integrity Council props up the status quo
CarbonPlan (Sept. 29, 2022) (with Sadie Frank, Freya Chay, and Jeremy Freeman)

Why climate policy must look beyond carbon pricing
Heinrich Böll Stiftung Magazine (May 23, 2022) (with David G. Victor)

California’s draft climate change scoping plan is incomplete
CarbonPlan (May 17, 2022)

Comments to Verra on ton-year accounting and NCX’s harvest deferral methodology
CarbonPlan (Apr. 25, 2022) (with Freya Chay and Grayson Badgley)

Why carbon offset disclosure matters
CarbonPlan (Feb. 8, 2022) (with Freya Chay and Sadie Frank)

A critique of NCX’s carbon accounting methods
CarbonPlan (Jan. 31, 2022) (with Freya Chay and Grayson Badgley)

Climate-related financial risk and corporate net-zero commitments
CarbonPlan (Nov. 1, 2021) (with Sadie Frank)

Addressing critical challenges in carbon dioxide removal
Climateworks (Dec. 10, 2020) (with Jan Mazurek, Frances Wang, and Jeremy Freeman)

It’s time to fix California’s cap-and-trade — again
CalMatters (May 29, 2020)

Will FERC uphold state support for clean energy?
Utility Dive (June 4, 2018) (with Shelley Welton)

Suing an academic critic isn’t only wrong, it’s also unjust
Stanford Daily (Nov. 29, 2017)

Understanding SB 775: A Realistic Path to Achieving California’s Climate Goals
Legal Planet (May 15, 2017) (with Michael Wara)

Pricing carbon: California’s unfinished climate priority
Bulletin of the Atomic Scientists (Jan. 10, 2017) (with Michael Wara)

California’s climate policy crisis
Niskanen Center (July 7, 2016)

Don’t Let Accounting Tricks Dominate the Carbon Market
San Jose Mercury News (Oct. 21, 2013)

Advocating Science
Stanford Lawyer (Spring 2011)

Legitimizing Torture
Stanford Daily (Apr. 21, 2011)

Making Carbon Markets Work
Scientific American (Sept. 24, 2007) (with David G. Victor)