They cover just 3% of the earth’s land surface, but are responsible for more than 70% of all carbon emissions. What will it take to make cities around the world cleaner?

Presented by Bryony MacKenzie. Featuring Lauren Sorkin, Resilient Cities Network; Aziza Makhbouch, OECD; Fred Åkerboom, City of Rotterdam, Puneet verma, Mission Green Delhi; Emily Tan, Shell.