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Activists of a non-governmental organization protest with a banner reading 'Keep it in the ground' during the UN conference on climate change COP21 in Le Bourget, on the outskirts of Paris, on December 9, 2015. / AFP / DOMINIQUE FAGET (Photo credit should read DOMINIQUE FAGET/AFP via Getty Images)

Activists of a non-governmental organization protest with a banner reading 'Keep it in the ground' during the UN conference on climate change COP21 in Le Bourget, on the outskirts of Paris, on December 9, 2015.  / AFP / DOMINIQUE FAGET        (Photo credit should read DOMINIQUE FAGET/AFP via Getty Images)