Mia Mottley, Prime Minister of Barbados, is on a mission to fight climate change through a radical scheme to reform the international financial system.

Called the Bridgetown Initiative, her plan aims to transform global institutions such as the IMF and the World Bank – freeing up billions, maybe even trillions of dollars, for poorer countries that are struggling to cope with the impacts of a hotter planet.

Presenter Graihagh Jackson is joined by the BBC’s Climate Editor, Justin Rowlatt, who interviewed Prime Minister Mottley at a crucial climate finance summit in Paris. With time running out in the battle to keep the world below the 1.5C warming threshold, we find out more about her plan, how it works and the progress being made.

Producers: Ben Cooper and Miho Tanaka