KEVIN ANDERSON – While the science and math around 2°C provides an unequivocal basis for radical reductions in emissions from wealthier nations, the politics continues to deliver grand but ultimately ineffectual gestures. Politically Obama’s proposal is certainly courageous and one for which he deserves credit. But scientifically, the 30% target and the collective acquiescence it has triggered, is a death sentence for many of tomorrow’s more vulnerable communities.