California's affordability crisis could lead to more relaxed emissions standards, according to a plan introduced by state ...

California emissions proposal would devastate Arizona, Nevada, U.S. economy — and the environment This shows the Phillips 66 refinery in Wilmington near Long Beach.

A new proposal by California regulators to further reduce the carbon intensity of transportation fuels will likely balance the market for one of the state's carbon credits, which saw prices fall ...

In an op-ed last month, I explained why California’s market-based approach to climate change isn’t working. Since the 2013 onset of the cap-and-trade program, the centerpiece of the state’s ...

California air regulators are likely to hear a barrage of criticism Thursday on a plan to slash fossil fuel use and reach carbon neutrality by 2045, a proposal that would require a sweeping shift ...

In addition, 15 other states — including New York, Massachusetts and North Carolina — have previously followed California’s moves regarding tailpipe emissions and may adopt similar proposals.

California regulators unveiled a proposal this week to ban the sale of all new gas-fueled cars by 2035, as the state pushes for more electric and zero-emissions vehicle sales in the next four years.

WASHINGTON — California is calling for zero-emission vehicles, including plug-in hybrids, to make up nearly 70 percent of new-vehicle sales by 2030, as part of an aggressive timeline set by the ...

Limiting trucks to no more than 65 mph nationally might have saved lives and fuel costs, but Trump regulators say it would ...

California must retire existing heavy-duty trucks to meet the state’s 2045 carbon neutrality goals, in addition to promoting the purchase of zero-emissions vehicles (ZEVs), a new study has found.

California is often touted as a leader on U.S. climate policy and it has set some of the most aggressive rules for regulating vehicle emissions.