Michael Mann is a Presidential Distinguished Professor of Earth & Environmental Science at the University of Pennsylvania and author of Our Fragile Moment. He's also one of the most renowned climatologists in the world - and that's why I was over the moon when he agreed to have a chat with me...

Given the extremely grim daily news on climate change, I ask Prof. Mann whether the fight for a habitable planet is over, how bad he thinks the upcoming El Nino will be, and finally, what kind of consequences do Trump's insane, climate denial policies have for the world's decarbonisation plans.