Greenhouse Gas Emissions

Trump rescinded the legal foundation for U.S. climate policy. California is preparing to sue — and may try to write its own rules.

Revenues from the state's carbon emissions auction will be used for high speed rail, wildfire suppression and legislators' discretionary spending.

California state officials are in Brazil for the annual United Nations climate conference. The visit highlights California’s role as a climate leader and supports its environmental policies, especially since the U.S. has no official federal delegation. However, some critics question whether the trip is worthwhile because California lacks the power to make international agreements.

At the state’s top air regulator, Lauren Sanchez will replace Liane Randolph, taking the helm as California battles Trump, rising costs, and the future of its climate agenda.

California’s Assembly Appropriations Committee killed “Leno’s Law” that aimed to give classic car owners like him a pass from smog requirements.

Proposed amendments to the Low Carbon Fuel Standard program fall short of the goals of transparency, equity and responsible policymaking, says a member of the California Air Resources Board.

Bikers — many of whom love their noisy combustion engines — say zero-emission motorcycles aren’t ready for long-distance rides. Motorcycles emit an “outsized portion” of smog-causing pollutants.

The farm subsidies for a California program aiming to reduce methane gas emissions have skewed the market, making pollution as valuable as dairy in some cases, and eroded the ability for family farms to compete.

A new analysis concludes that unless California almost triples its rate of cutting greenhouse gases, the state won't meet its 2030 climate change target. Some emissions were rising.

California grants climate credits for fuel made from cow manure, but there’s a paradox: The state's program encourages collection of methane yet promotes natural gas.