Al Jazeera: Like many who took part in this year's UN climate talks, I leave Warsaw tired. Not as tired as those that spent two weeks talking, drafting, wrangling, redrafting and horse-trading, followed by an almost 40-hour marathon final session. But I do feel tired. I'm tired by the fact that all of that effort, energy and, in the main, goodwill has again resulted in so little progress.
Where does it go wrong? Nobody can now dispute that climate change is a threat to human society, to the planet as a whole....