“This is a public health emergency". In this episode of Clear The Air, Sadiq Khan is joined by Rosamund Adoo-Kissi-Debrah whose daughter, Ella, was the first person in the UK to have air pollution listed as a cause of death on her death certificate. Rosamund tells Sadiq about how the pandemic has changed attitudes to air pollution, her unlikely friendship with Arnold Schwarzenegger, and her very personal campaign for cleaner air for everyone.