Every ship I see in port is still belching clouds of black smoke from bunker fuel. Never heard of a LNG ship.
This lists 21 out of ~300 total cruise ships are LNG.
This says most new passenger ships are LNG:
https://www.cruisemapper.com/wiki/752-cruise-ship-engine-pro...
Obviously depends on cruise company and the tail is pretty long of smaller companies who aren't building new ones.
Every ship I see in port is still belching clouds of black smoke from bunker fuel. Never heard of a LNG ship.