News at a glance: China ’s carbon pledge, ARPA-H’s interim head, and an exascale computer

Some content has been removed for formatting reasons. Please view the original article for the best reading experience. Table of contents A version of this story appeared in Science, Vol 376, Issue 6597. Download PDF CONSERVATION U.S. moves to stop Alaska copper mine The U.S. Environmental Protection Agency (EPA) is moving to block construction of a massive copper and gold mine that would risk polluting the headwaters of Alaska’s Bristol Bay, home to the world’s largest sockeye salmon runs. EPA announced last week it plans to forbid disposal of mine waste from the proposed Pebble Mine in the surrounding area, a move that would effectively kill the project. “Two decades of scientific study show us that mining the Pebble Deposit would cause permanent damage to an ecosystem that supports a renewable economic powerhouse and has sustained fishing cultures since time immemorial,” Casey Sixkiller, EPA’s regional administrator, said in a press release. The proposal signals what could be the final chapter in a decadeslong saga that came to a head in 2014 when the administration of then-President Barack Obama announced plans to block the mine. EPA reversed course under former President Donald Trump. But in November 2020, the U.S. Army Corps of Engineers announced it would not grant a crucial permit after concluding the project was “contrary to the public inte...
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