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The UK recorded its hottest ever May Day on Thursday, having just experienced its sunniest April since records began, according to the Met Office.

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In the vast white expanse around Churapcha in eastern Siberia, the ever more rapid thaw of the permafrost is changing the landscape, cracking up houses and releasing greenhouse gases.

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President Donald Trump's administration has fired the authors of the United States' premier climate report, a move scientists said threatens to derail a key assessment vital to preparing for global warming.

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An unprecedented coral bleaching episode has spread to 84 percent of the world's reefs in an unfolding human-caused crisis that could kill off swathes of the essential ecosystems, scientists warned Wednesday.

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In his California laboratory, Ralph Keeling examines a graph created from data his father began collecting that keeps a record of the amount of carbon dioxide in the atmosphere.