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The 20th century's biggest carbon emitter is also one of the few advanced democracies where climate change is not accepted as fact. This makes it hard for some to trust U.S. efforts on the issue.

The U.S. and China are the world's two largest polluters, but the will to do something about climate change is lower in both than in the rest of the world. In the U.S., there's a party split.

NPR's Ari Shapiro talks with Dr. Jane Lubchenco, who leads climate and environment science efforts at the White House, about the findings of the United Nations' major new report on climate change.

In places like Antarctica, small things can make a difference. Scientists are finding that penguin waste is helping form clouds, which could be offsetting the effects of climate change.

In one analysis, economists predict that extreme weather could boost the number of international conflicts by as much as 50 percent by 2050. Higher temperatures might also increase the rates of murder, rapes and domestic violence, they say because aggression seems to rise with the mercury.

A team of scientists and economists claims they've come up with the most thorough analysis of the cost of climate change in the U.S. Most of the country will suffer economic loss in addition to higher mortality from heat waves and loss of agriculture productivity by 2100. But like all predictions far into the future, this one has a wide range of outcomes and could be overshadowed by new technology still to be invented.

We're nearing a year when a negative leap second could be needed to shave time — an unprecedented step that would have unpredictable effects, a new study says.

President Biden has repeatedly promised the shift to clean energy will create "good-paying union jobs." But the wind and solar industries generally pay less, are not unionized, and need fewer people.

For some climate activists, the personal decision to have a child is also fraught with moral consequences: the negative impact on the environment, and on the quality of life for those children.

Rising temperatures are speeding up erosion in some Alaska Native villages and making traveling on ice roads more dangerous, threatening the Census Bureau's plans for an accurate count.