The only practical solution, given human nature, is your second option: "accept economic inequality". Humans being what they are, people just won't accept bein

The only practical solution, given human nature, is your second option: "accept economic inequality". Humans being what they are, people just won't accept being told that they can't fly to New Zealand for their 2 week adventure holiday. However if the price of the tickets reflects the cost to the environment - say it costs $10K instead of $2K - then the environment can be protected, and the lucky few can continue to indulge, while others must forgo or get there by e.g. deck handing on a yacht (by which I mean a sailboat, not a Larry Ellison style super yacht).