This month it's all about the space environment - how do you remove space debris from orbit and make space more sustainable? The Earth Space Sustainability Initiative's (ESSI) Stuart Clark discusses missions to remove dead satellites, and Nick Shave of Astroscale and Clearspace's Rory Holmes explain their missions. Plus, light pollution problems: night skies so bright, some people never see the Moon... Like this podcast? Please help us by supporting the Naked Scientists