Calif.’s low-carbon fuel standard gets green light to ratchet up stringency

By Alex Nieves | 06/27/2025 04:13 PM EDT

The California Air Resources Board announced Friday that state administrative officials had signed off on the changes.

Cars release exhaust fumes as children head to school.

Low-carbon fuel standard amendments will take effect July 1. Michael Probst/AP

Amendments to California’s hot-button emissions trading program for transportation fuels will take effect early next week, state regulators announced Friday, following approval by the state Office of Administrative Law.

What happened: The California Air Resources Board said that the Office of Administrative Law has approved changes to the low-carbon fuel standard, days before they’re set to take effect and days after state Democratic lawmakers introduced a bill to roll the program back.

Why it matters: The program — which requires fuel producers to reduce the carbon intensity of their products or buy credits from other companies that generate them by producing cleaner fuels — has become a political hot potato in Sacramento over its impact on gasoline prices.

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The amendments set to take effect July 1 are aimed at increasing the program’s stringency and driving up credit prices for lower-carbon fuels that had fallen to record lows since a glut of renewable diesel started flooding the market in 2021.

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