COPOUTMost people tend to turn away, perhaps understandably, from the key existential issue of the day: climate change or, some would say more accurately, climate collapse. Nick Breeze tells the engaging, very human story of successive COP conferences over the past decade: it is a tale of imperfection, failure even, but not yet defeat. So far, the UN process has achieved almost the exact opposite of what it first set out to achieve at the Rio Earth Summit