Marsh looks at the environmental and social impact of outdoor digital advertising, and Mike gives the low down on the risks of glyphosate-based weedkillers. Meanwhile, Mike goes to watch Dune 2, Marsh goes to the athletics, and Alice is back!We survive on donations from listeners like you. If you want to support the show and the work we do, you can sign up for a regular donation at patreon.com/merseyskeptics.