Dear lamenting friends,
I am more hopeful than you for the same reason I was pretty sure Greta's BS will not kill air travel
.
There's so many jobs depending on air travel in non-direct way. Travel & leisure industry is obvious - but remember: these are restaurants, car rentals, diving schools, street food vendors, even groceries and pharamcies all around the glob. There are countries which depend mostly on tourism It's also very likely that some many national parks around the glob would be deserted and with most of it's animals killed to decorate houses and feed "traditional Chinsese medicine". I doubt that rhinos of Nepal, gorillas of Virunga and such would survive without rich visitors.
So there will be a lot of effort put to bring tourist back to Barcelona, Venice, Phuket and so on.
Have faith, brothers and sisters.
&