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.

At COP29, developing nations rejected what they called too little money to deal with climate change. They and United Nations reports say $1.3 trillion is needed.

Countries at the COP29 climate summit were warned on Wednesday that the "hardest part" was about to start in talks over how much money should be provided to developing countries to help them cope with climate change.

In the wee hours Sunday at the United Nations climate talks, countries from around the world reached an agreement on how rich countries can cough up the funds to support poor countries in the face of climate change.

Negotiators from nearly 200 nations made a nonbinding commitment that wealthy nations would aim to provide $300 billion annually by 2035 to help poorer nations.

The world approved a bitterly negotiated climate deal Sunday but poorer nations most at the mercy of worsening disasters dismissed a $300 billion a year pledge from wealthy historic polluters

The COP29 climate conference ends in "disaster," as wealthy nations delivered a deal on finance that was rejected by key developing countries.

The world agreed to a new climate deal at COP29 in Baku, Azerbaijan, Saturday, with wealthy countries pledging to provide $300 billion annually by 2035 to poorer countries to help them cope with the increasingly catastrophic impacts of the climate crisis — a figure many developing countries criticized as vastly insufficient.