California Gov. Gavin Newsom signs law requiring big businesses to disclose emissions

SACRAMENTO, Calif. (AP) — Large businesses in California will have to disclose a wide range of planet-warming emissions under a new law Gov. Gavin Newsom signed Saturday — the most sweeping mandate of its kind in the nation.

The law will bring more transparency to the public about how big businesses contribute to climate change, and it could nudge them to evaluate how they can reduce their emissions, advocates say. They argue many businesses already disclose some of their emissions to the state.

But the California Chamber of Commerce, agricultural groups and oil giants that oppose the law say it will create new mandates for companies that don't have the experience or expertise to accurately report their indirect emissions. They also say it is too soon to implement the requirements at a time when the federal government is weighing emissions disclosure rules for public companies.