If we’re going to win the climate war, the battle cry has to be positive. “Pain now or apocalypse later” just doesn’t cut it, and nor does “save the planet”. The climate scientist and strategist argues that it’s time to stop focusing on disaster and start pouring our energy into imagining – and creating – the promised land. Because fundamentally the planet doesn’t care what we do. This is about saving ourselves. Chaired by Jim Al-Khalili.