Rich countries must phase out coal by 2030 and oil and gas by 2040, with poorer countries lagging behind after a decade, to give the world a chance to limit warming to 1.5 degrees Celsius, UN climate scientists said on Friday. In a note to UN Secretary-General António Guterres and the UN's climate change agency, shared with AFP, climate scientists from the Potsdam Institute for Climate Impact Research and the University of Exeter said there was very little room for anything other than a complete phase-out of fossil fuels. fuels. The steep timeline they set comes as climate negotiators at the COP28 talks in Dubai wrangle the future of oil, gas and coal, which are responsible for the lion's share of planet-warming emissions. (AGENCE FRANCE-PRESSE)