Mia Mottley, Prime Minister of Barbados, is on a mission to fight climate change through a radical scheme to reform the international financial sytem. With time running out in the battle to keep the world below the 1.5C warming threshold, the Bridgetown Initiative 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. Graihagh is joined by the BBC’s Climate Editor, Justin Rowlatt, who interviewed Prime Minister Mottley at a crucial climate finance summit in Paris. We find out more about her plan, how it works and the progress being made. Producers: Ben Cooper and Miho Tanaka Researcher: Octavia Woodward Series Producer: Simon Watts Editor: China Collins Sound Engineer: Tom Brignell Production Coordinators: Debbie Richford and Sophie Hill