UN chief says 'immediate and drastic' emissions cuts needed to avert climate change catastrophe

"You cannot build peace on a burning planet," United Nations Secretary-General António Guterres told reporters, stressing that climate change is central to the U.N.'s work because it contributes to geopolitical instability.

"You cannot build peace on a burning planet," United Nations Secretary-General António Guterres told reporters, stressing that climate change is central to the U.N.'s work because it contributes to geopolitical instability.