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.

It’s not near the $1.3 trillion developing countries were asking for, but it’s three times the 2009 deal that is expiring.

United Nations climate negotiators agreed on a funding formula to help developing countries cope with the effects of climate change early Sunday in Azerbaijan after two weeks of intense negotiations.