the intergovernmental panel on climate change is the international body set up to provide a clear scientificts and possible solutions. this week, ipcc scientists and representatives from more than 150 governments willjointly agree a summary for policymakers, based on key findings from the main report. joining me now from south korea is professorjim skea, chair of sustainable energy at imperial college london's centre for environmental policy and the co—chair of the ipcc working group iii. thank you forjoining us. one wonders why a report like this, that shows us what will happen if temperatures rise by 1.5 celsius, why they didn't have that information before the paris climate agreement was agreed? yes, before the paris agreement, the aim that governments had was to keep temperatures below two degrees above preindustrial levels and paris actually shifted the dial because the ambition was to make it 1.5 degrees. what the report is doing, first, the government asked us to look at the impact of global warning of1.5 look at the impact of global warning of 1.5 degrees but it also asked us to look