Thousands of demonstrators marched in Belem, Brazil, at the halfway point of United Nations climate talks to demand progress from negotiators on the problem of climate change — among other causes.

But one thing that is clear about Newsom is his attitude. The two-term governor has modulated climate policy in some cases, but, in general, has refused to yield to threats from the business community about the costs of action. And, as his tack against Trump has shown, he isn’t afraid to be relentless as he takes on opposition.

You asked Somini Sengupta, our international climate reporter, about the science and the politics. She responded from COP30 in Brazil.

The U.S. Chamber of Commerce is asking the Supreme Court to pause new California laws expected to require thousands of companies to report emissions and climate-risk information.

Under President Trump, the U.S. has taken steps to roll back climate policies. Here are six significant changes.

Ten years after the Paris climate agreement, the limited progress we’ve made in reducing global warming means that there will be less extreme heat in the future than there would be without the accord

California Governor Gavin Newsom represents U.S. at Brazil climate conference while Trump administration criticizes state's average $4.67 per gallon gas prices.

Scientists have developed a new way to represent the world's cities in global climate and Earth system models (GCM & ESMs), offering a more accurate picture of how urban areas are being affected by—and contributing to—climate change.

This summit is unlike any of its predecessors in at least one significant way: The Indigenous presence is palpable and strong.

Government officials from across the world gathered in Belem, Brazil for the United Nations' annual climate talks.

Saturday’s march through the streets of Belém, Brazil, was a contrast to the muzzling of dissent at past years’ U.N. summits.