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.

Amid climate change, campaigners lament shortfall in help to poorer countries to switch to low-carbon economies, and decry influence of Saudi Arabia, Azerbaijan and looming Donald Trump presidency

The COP29 summit in Azerbaijan has reached an agreement to provide at least $1.3 trillion annually through 2035 to poorer countries to help them fight climate change, with at least $300 billion to come from mainly industrialized nations.