What is the best way to reduce car use in cities? Kimberly Nicholas, an associate professor of sustainability science at Lund University, looks at the evidence from across Europe. You can read the text version of this in-depth article here. The audio version is read by Adrienne Walker in partnership with Noa, News Over Audio. Listen to more articles from The Conversation, for free, on the Noa app.  The music in In Depth Out Loud is Night Caves by Lee Rosevere. In Depth Out Loud is produced by Gemma Ware. This story was edited by Paul Keavney and Mike Herd and came out of a project at The Conversation called Insights. You can read more stories in the series here. See acast.com/privacy for privacy and opt-out information.