Thetwo-weekUNclimatechangeconferencesheldinadifferentcityeachyearhaveahabitofbeingovershadowedbytroubleselsewhere,fromAfghanwarstoEUfinancialcrises.從阿富汗戰爭到歐盟(EU)財政危機,每年在不同城市舉行、每......