climate change climate change

France's President Emmanuel Macron, center, Arnold Schwarzenegger, left, and Prime Minister of Belgium Charles Michel, right, pose for a photo in front of the Eiffel Tower while aboard a boat cruising on the Seine River after the One Planet Summit, Paris, Tuesday, Dec. 12. Thibault Camus/AP hide caption

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Thibault Camus/AP

Melt ponds dot a stretch of sea ice in the Arctic Ocean, north of Greenland. This year was the Arctic's second-warmest in at least 1,500 years, after 2016. Nathan Kurtz/NASA hide caption

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Nathan Kurtz/NASA

Arctic's Temperature Continues To Run Hot, Latest 'Report Card' Shows

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Researchers found that when narwhals like these were released from a net, the animals' heart rates dropped even as they were swimming rapidly. Flip Nicklin/ Minden Pictures/Getty Images hide caption

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Flip Nicklin/ Minden Pictures/Getty Images

Stressed-Out Narwhals Don't Know Whether To Freeze Or Flee, Scientists Find

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Satellite imagery of the Atlantic Ocean on Sept. 8, as three hurricanes (Katia, Irma, and Jose) are on the move. NASA/J. Stevens/J. Allen hide caption

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NASA/J. Stevens/J. Allen

This Year's Hurricane Season Was Intense. Is It A Taste Of The Future?

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Buildings are seen near the ocean in North Miami. Broward County and many communities in southeast Florida have been aggressive and proactive in preparing for the effects of climate change. Joe Raedle/Getty Images hide caption

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Joe Raedle/Getty Images

Credit Rating Agency Issues Warning On Climate Change To Cities

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Grants funded by the National Science Foundation have seen a drop in the use of the phrase "climate change" in public summaries. Katie Park and Rebecca Hersher/NPR hide caption

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Katie Park and Rebecca Hersher/NPR

Climate Scientists Watch Their Words, Hoping To Stave Off Funding Cuts

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The suns sets as an iceberg floats in the Nuup Kangerlua Fjord near Nuuk in southwestern Greenland, where glaciers have been melting. David Goldman/AP hide caption

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David Goldman/AP

The Sea Level Threat To Cities Depends On Where The Ice Melts — Not Just How Fast

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A family evacuated their apartment complex in west Houston, where high water coming from the Addicks Reservoir flooded the area after Hurricane Harvey on Aug. 30th. Erich Schlegel/Getty Images hide caption

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Erich Schlegel/Getty Images

Scientists Glimpse Houston's Flooded Future In Updated Rainfall Data

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Climate conference attendees in Bonn, Germany, see a representation of Earth's climate trends. Ulrich Baumgarten/Getty Images hide caption

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Ulrich Baumgarten/Getty Images

As Climate Negotiators Debate Nations' Pledges, Scientists Worry It's Not Enough

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Smoke stacks in New Brunswick, Canada, were photographed in 2015. Global carbon emissions are on the rise after holding steady for several years, researchers say. Tony Webster/Flickr hide caption

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Tony Webster/Flickr

President Donald Trump shakes hands with EPA chief Scott Pruitt on June 1 after speaking about the U.S. role in the Paris climate change accord in the Rose Garden of the White House in Washington. Andrew Harnik/AP hide caption

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Andrew Harnik/AP

The Pacific walrus is facing "extinction from climate change" after the White House refused to list the species as endangered, one conservation group says. S.A. Sonsthagen/AP hide caption

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S.A. Sonsthagen/AP