Climate talks in Baku ended with a mix of urgency and delay, progress and frustration. But finance deal could be a game-changer.

United Nations climate talks adopted a deal to inject at least $300 billion annually in humanity's fight against climate change, aimed at helping developing nations cope with the ravages of global warming in tense negotiations.

Trade tensions are flaring at the COP29 climate summit, with China, Brazil and a host of developing countries complaining that perceived trade barriers, such as the European Union's carbon border levy,