ClimateBiz: Without a doubt, the best word to describe a COP is a circus. There are some 11,600 registered delegates, ranging from presidents to vegan activists too young to vote, from captains of industry to bureaucrats inhabiting innumerable byzantine United Nations agencies. There is no doubt that the energy is both exhilarating and exhausting and the sheer breadth of the human experience that you can witness in comparatively tight quarters is impressive. But is it doing anything to really …