Yep, that’s the reality. The world is full of tourists. In the best interests of the planet, that would all grind to a halt, but so too would the world economy. Planes, cruise ships, lorries, cars, trains, busses, all a complete environmental disaster, however they’re powered. Just the manufacturing and infrastructure alone is hugely destructive. IMHO the only hope is to control global population levels, but that’s about as likely as people giving up foreign holidays.
A more immediate problem is an ageing electorate and how it will define political narratives moving forward. The older voter doesn't seem that Green friendly.