Developing countries are planning to propose a mid-term finance target for 2015, to ensure that the climate finance pledge made by developed countries is guaranteed, said sources at the fourth day of the climate change talks in Doha, Qatar.

But it still remains an internal discussion, and the specific number has yet to be decided, sources said.

At the 2009 Copenhagen talks, developed countries made a commitment to raise $100 billion per year by 2020 to help developing countries cope with climate change.