The Supreme Court declined Monday to take up an appeal from conservative states challenging California’s ability to establish strict vehicle emission rules that effectively set the standard for ...

California policymakers and environmentalists view recent Supreme Court actions as a small victory for clean air, but worry about future legal challenges.

California was explicitly allowed to set its own motor vehicle emissions standards because of the unique pollution problem in the state. The problems were unique in both character and intensity ...

WASHINGTON (AP) -- The Supreme Court on Friday said it would take up a business-backed appeal that could make it easier to challenge ... California's nation-leading standards for vehicle emissions.

California emissions:Supreme Court to hear challenge to California's pace-setting vehicle emissions rules The Alliance for Automotive Innovation, a trade group representing General Motors GM.N ...

In contrast to California, the Biden EPA has put in more forgiving vehicle emissions standards, allowing plug-in hybrids — vehicles that combine gas engines and EV-like batteries — to play a ...

Drivers sit in traffic on southbound Interstate 5 during the afternoon commute heading into downtown San Diego on May 29, 2024. The Supreme Court declined Monday to take up an appeal from ...