A leading climate researcher has told FRANCE 24 that the conclusion of the COP30 summit at the weekend was scientifically nothing less than a failure. Johan Rockström is director of the Potsdam Institute for Climate Impact Research. The German institute is seen as one of the world’s top environmental think tanks. Although more funding for countries to adapt to extreme weather events was agreed, there were no explicit details to phase out fossil fuels or strengthen countries' inadequate emissions-cutting plans, which dozens of nations had demanded. Rockström spoke to us in Perspective.