California fights America's worst smog with the country's toughest environmental regulations. But is the Golden State really ...

The Supreme Court heard oral arguments Wednesday in a landmark case that could spell the end of California’s Clean Air ...

President Donald Trump had repealed the rule in his first term. In December, Biden reinstated it.Next week, Congress is ...

The California Air Resources Board, known as CARB, created the cap-and-trade program as a way of meeting the state’s self-imposed mandate to reduce greenhouse gas emissions to ever-lower targets ...

the California Air Resources Board, said in 2023 the state may not meet its self-imposed carbon reduction goal by 2030. Still, cap-and-trade is California’s “most cost-effective climate policy ...

The California Air Resources Board holds up its program as a gold standard for the growing carbon-trading sector. Oregon, Washington and New Mexico have approved programs built on the California ...

The California Air Resources Board says the first-in-the-nation project will take about $100 million from the state budget to purchase data collected by the satellites about methane plumes.

Local officials say a proposal to regulate the sale of gas heaters will burden residents while proponents say it will improve air quality.