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There is one number that the Environmental Protection Agency relies on to decide which climate policies to pursue. So why does that number assume the lives of richer people are worth more?

A staggering $750 million donation was given to Caltech to fund climate change and sustainability research. But can private philanthropists fill in the funding gap left by the federal government?

The shorebirds are rebounding, despite powerful coastal storms that destroyed nesting habitat.

The infrastructure bill will set aside billions of dollars to update the electric grid. Experts weigh in on whether or not it will be enough as extreme weather events disrupt access to electricity.

The plan targets the region’s highest emitting sectors — transportation and energy — and lays out a suite of local actions to lower greenhouse gas emissions and increase resilience to climate threats.

NPR journalists have fact-checked and analyzed the president's announcement that the U.S. will pull out of the international accord, including Trump's comments on terrorism and the economy.

Representatives of the world's nations have gathered in Bali, Indonesia, to plan how to reduce greenhouse gas emissions after the Kyoto agreement expires. There is growing optimism that the conference will be able to reach its very modest goals.

Human ancestors got steadily larger over the last 1 million years. Our relatives living in colder places developed bigger bodies, a new study finds.

The federal government's top climate scientists announced Tuesday that 2012 was really hot — among the top 10 hottest years on record and the hottest ever in the U.S., with rising sea levels, less Arctic sea ice and warmer oceans. And the American Geophysical Union called humanity "the major influence" on global climate change.

Amazon, the company Bezos founded and heads, has come under increasing scrutiny for its own carbon footprint.