What would a flying-free world look like?

Aviation has long been a pain in the neck for those working to cut human-caused greenhouse gas emissions. It is the pinnacle of a "hard-to-decarbonise" sector: energy-intensive, lacking in immediate technical options to make it lower carbon, and strongly associated with the lifestyles of the richest and most powerful in society.
Read more: https://www.bbc.com/future/article/20220519-what-if-we-all-stopped-flying?source=Snapzu