Scientists warn world will miss key climate target

Grim backdrop to vital global emissions talks as new analysis shows 1.5C limit on warming is close to being brokenLeading climate scientists have warned that the Earth is perilously close to breaking through a 1.5C upper limit for global warming, only eight months after the target was set.The decision to try to limit warming to 1.5C, measured in relation to pre-industrial temperatures, was the headline outcome of the Paris climate negotiations last December. The talks were hailed as a major succ