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.

Countries at the COP29 summit in Baku adopted a $300 billion a year global finance target on Sunday to help poorer nations cope with impacts of climate change, a deal its intended recipients criticized as woefully insufficient.