Cutting emissions proves a sticking point at Poland climate talks

Slow progress on 2015 Paris agreement comes as scientists warn of need to get on track

Negotiators at the climate conference in Poland have inched closer to an outcome, as the official deadline for finishing a deal ran out.

The conference was meant to approve a rulebook which would govern how nations put into action the goals set in the landmark Paris agreement of 2015, when the world resolved to hold global warming to no more than 2C above pre-industrial levels, with an aspiration to limit temperature rises to no more than 1.5C.