California must now show how it will clear the air in national parks

US environmental regulators have approved California's plan to reduce regional haze. This means California must now follow its own plan to improve visibility in national parks and wilderness areas.

For years, states had to submit plans to clean up the air in national parks, but the plans often lacked specific actions or timelines. This approval means California's plan is now legally binding. It sets a clear path for reducing pollution that obscures views in places like Yosemite and Sequoia National Parks, requiring specific actions from polluters.