By Kate Abnett, Nailia Bagirova and Karin Strohecker BAKU (Reuters) -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.

The COP29 UN climate summit released a first draft deal Thursday which puts at least $1 trillion of financing on the table, yet key details on where that money will come from still need to be ironed out.

The main goal of COP29 is to agree how much money richer developed countries will provide poorer developing ones to help them fight climate change.

The United Nations climate body on Thursday published a fresh set of options for the COP29 summit's primary goal of agreeing how much money richer countries should provide to poorer ones to help them deal with climate change.