This still seems solvable; environmental regulations are almost always stricter at higher levels of government, and charter buses and massive development need to meet those.
Cruise ships stop at different countries as well, if your gets too bad they go next door. There are a number of islands in the Caribbean that don't get much ships. The Mediterranean likewise has a number of countries to go to.
You could prevent Alaska and Norway cruises, and a bunch of others that are mostly one country, but there are lots of other countries for those ships to go to.
You could prevent Alaska and Norway cruises, and a bunch of others that are mostly one country, but there are lots of other countries for those ships to go to.