U.N. report: World 'needs Plan B' on climate

The world needs a Plan B on climate change because politicians are failing to reduce carbon emissions, according to a UN report. It warns governments if they overshoot their short-term carbon targets they will have to cut CO2 even faster in the second half of the century to keep climate change manageable. If they fail again, they will have to suck CO2 out of the atmosphere.
Background:
World 'needs Plan B' on climate - IPCC report [BBC]
Opinion: Call climate change what it is: violence [The Guardian]