> Convince them clean air is more important for their health than the next Mediterranean carnivore diet and we might start getting the tech we need.

Rich people already have fancy air filters in their cars and homes, they spend several months a year breathing clean air in places like Courchevel and St Barts. In places like London they have special taxes to keep poor people and their nasty polluting cars away from the posh areas.

Unless you’re going to convince them to wear masks, there’s probably not much tech can improve here.