FILE - In this July 16, 2017, file photo, ice is broken up by the passing of the Finnish icebreaker MSV Nordica as it sails through the Beaufort Sea off the coast of Alaska. Down to its final weeks, the Trump administration is working to push through dozens of environmental rollbacks that could weaken century-old protections for migratory birds, expand Arctic drilling and hamstring future regulation of public health threats. (AP Photo/David Goldman, File)
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