The agreement was meant to provide momentum for efforts to curb global warming in a year destined to be the hottest on record. Instead it left developing countries frustrated.

Countries agreed on a deal to inject at least $300 billion annually in humanity's fight against climate change, aimed at helping poor nations cope with the ravages of global warming at tense United Nations climate talks in the city where industry first tapped oil.

Nations agreed to a new deal Saturday that has developed countries "taking the lead" in providing up to $300 billion per year by 2035 to help vulnerable ones withstand climate change impacts and decarbonize.