Get latest articles and stories on World at LatestLY. UN Secretary-General Antonio Guterres on Monday proposed a deal at COP28 on phasing out fossil fuels, telling negotiators that "now is the time for maximum ambition and maximum flexibility," as UN climate talks in Dubai head into the home stretch, UN News reported. World News | At COP28, UN Chief Proposes Deal on Phasing out Fossil Fuels.