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California Eyes New Emissions Rules Amid Federal Rollback

11/11/2025

23 5

Summary

Story summary

The California Air Resources Board (CARB) is examining options to regulate vehicle emissions as the Trump administration moves to revoke federal climate rules.
Vehicle emissions account for more than one-third of California's greenhouse gases.
If the U.S. Environmental Protection Agency abandons its authority, California could set its own standards, leading to a patchwork and new regulatory challenges.

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Story summary

The California Air Resources Board (CARB) is examining options to regulate vehicle emissions as the Trump administration moves to revoke federal climate rules.
Vehicle emissions account for more than one-third of California's greenhouse gases.
If the U.S. Environmental Protection Agency abandons its authority, California could set its own standards, leading to a patchwork and new regulatory challenges.