Babbage: Urban jungles

As urbanisation progresses and lethal heatwaves become more common, could miniature forests help air-condition cities? Plus, how virtual clinical trials could save money, time and lives. And, counting the hidden costs of artificial intelligence with Kate Crawford, cofounder of the AI Now Institute at NYU and author of “Atlas of AI”. Kenneth Cukier hostsFor full access to The Economist’s print, digital and audio editions subscribe at economist.com/podcastoffer and sign up for our new weekly science newsletter at economist.com/simplyscience Hosted on Acast. See acast.com/privacy for more information.