What is the future of public transport in the wake of the covid-19 pandemic? Also, the United Nations’ Assistant Secretary-General on how countries should prepare for future disasters. And could a “carbon surveillance” system help save the planet? Tom Standage hosts   Please subscribe to The Economist for full access to print, digital and audio editions: www.economist.com/podcastoffer   See acast.com/privacy for privacy and opt-out information.