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Dozens of cities are vowing to cut their carbon emissions and uphold the U.S. commitment to the Paris climate deal. Despite progress, many are falling short of their most ambitious goals.

Steven Falk of Lafayette, Calif., has resigned because he says he cannot carry out policies that fail to address the urgent threat of a changing climate.

Vermont is the first state in the nation to adopt a superfund-style law for major oil companies. It lets the government take action to recoup climate-related damages.

More than 150 countries have reached a major agreement in Kigali, Rwanda to reduce emissions of a powerful chemical used in refrigeration and air conditioning that traps heat in Earth's atmosphere.

Intense climate negotiations in Glasgow, Scotland, brought about major breakthroughs and compromises, as world leaders sought to avert extreme climate change.

The concert in Rio de Janeiro took place during one of the worst heat waves ever in Brazil. The country is in the middle of a record-breaking six months of extreme weather.

Under the Paris climate deal, exports of oil, gas and coal don't count toward a country's emissions. That's coming in for scrutiny as leaders gather for another global climate summit.

President Obama is touting a government report on climate change. He's taking steps to limit the greenhouse gases that contribute to a warming planet, but he faces political heat on Capitol Hill.

Climate change is driving worse weather "whiplash" in places like California, creating conditions for more intense wildfires like the devastating blazes in LA.

A trial is wrapping up this week in Washington, D.C., with big stakes for climate. One of the world's most prominent climate scientists is suing a right-wing author and an analyst for defamation.