I’m a big believer in looking after the environment but I’m not quite sure that the general population of earth will suddenly reduce the amount of flying they do based on their love for nature.
The reason I say this, is that about 15 years ago the developed world was making a massive fuss about American-style SUV fuel guzzlers and how they were the enemy of the future of the earth. Fast forward a few years and here we are with all developed countries’ populations driving expensive oversized luxury SUVs despite us all apparently despising them.
I predict aviation will be no different.