KNOTTINGLEY, ENGLAND - DECEMBER 18: Miners react after their last shift at Kellingley Colliery on December 18, 2015 in Knottingley, England. Kellingley began production in 1965 and is the UK's last deep coal mine. Its closure will complete a carefully managed two-year plan for the UKs deep mines. This has been implemented by UK Coal with financial support from the British government. It follows a long period of difficult trading conditions largely due to low international coal prices. (Photo by Oli Scarff - WPA Pool/Getty Images)
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