California tightens carbon market to get deeper emissions cuts

By Anne C. Mulkern | 09/19/2025 06:19 AM EDT

Legislation that Gov. Gavin Newsom plans to sign also requires protection of consumers from major price increases by businesses.

A tanker truck passes an oil refinery in Richmond, California.

A tanker truck passes an oil refinery in Richmond, California. Refineries and other business in California will face increased pressure to reduce greenhouse gas emissions under legislation Gov. Gavin Newsom (D) says he will sign. Paul Sakuma/AP

A major California climate program is about to receive a tough assignment — delivering big greenhouse gas emissions cuts while protecting consumers from major cost hikes.

Gov. Gavin Newsom (D) plans to sign legislation extending California’s statewide carbon market through 2045 and potentially making the market more aggressive in reducing plant-warming emissions.

AB 1207 also requires the California Air Resources Board, or CARB, which runs the market, to try to avoid making consumers pay excessively for the additional emissions cuts through higher gasoline prices and other costs.

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“It probably won’t be easy,” said Meredith Fowlie, faculty director of the Energy Institute at University of California, Berkeley’s Haas School of Business.

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