I don't think it requires giving up on "affordable global flight". It might be a bit more expensive -- getting aircraft to be tens of decibels quieter cost something, too.
Externalities -- whether they're noise imposed on a community or climate impacts -- aren't generally addressed by the market on its own.
Indeed, we have a new regulatory regime coming into play for airplane emissions slowly-- with first effects in 2028.
Externalities -- whether they're noise imposed on a community or climate impacts -- aren't generally addressed by the market on its own.
Indeed, we have a new regulatory regime coming into play for airplane emissions slowly-- with first effects in 2028.