We owe it to our fellow humans – and other species – to save them from the catastrophic harm caused by climate change. The philosopher approaches climate justice as something that should motivate us all. Starting from irrefutable science and uncontroversial moral rules, she explores our obligations to each other and to the non-human world, unravels the legacy of colonialism and entrenched racism and makes the case for immediate action. Cripps is a senior lecturer at the University of Edinburgh and author of Climate Change and the Moral Agent. ​In conversation with Andy Fryers, Sustainability Director at Hay Festival.