Performers wearing effigies of world leaders (From L) German chancellor Angela Merkel, China’s president Xi Jinping, US president Barack Obama, Indian prime minister Narendra Modi and French president Francois Hollande gather for a breakfast organized by Oxfam NGO in Paris, on the eve of the COP21 United Nations conference on climate change. Photograph: Eric Feferberg/ AFP/Getty Images

France has put 24 green activists under house arrest ahead of the United Nations climate talks, using emergency laws put in place following the(...)