In his latest climate change 101, Jordan Dunbar looks at the world's success stories. These include the rise of renewable energy, greener urban planning and deep - if insufficient - cuts in carbon emissions. His guest is Dr Caterina Brandmayr, Director of Policy and Translation, Grantham Institute for Climate Change and the Environment, Imperial College London.

Presenter and Producer: Jordan DunbarResearchers: Octavia Woodward and Tsogzolmaa ShofyorSound Design: Tom BrignellEditor: Simon Watts