Who should pick up the bill for climate damage?
One of the biggest debates over the last few years is how much countries should contribute to a new fund that will help developing countries cope with climate change. Many developing countries argue that the world's biggest polluters, and those that have benefited economically from it, have not paid their fair share of climate finance to date.
But what is even considered fair? We look at the data and talk to Sarah Colenbrander and Laetitia Pettinotti from the Overseas Development Institute, and Ani Dasgupta from the World Resources Institute to find out why it's so hard to answer this question.
Video by Darryl Laiu