>and instead take a train or ship. It's arguably safer and definitely greener. I'm pretty sure that cruise ships are definitely NOT greener than airplanes for

>and instead take a train or ship. It's arguably safer and definitely greener. I'm pretty sure that cruise ships are definitely NOT greener than airplanes for intercontinental travel. (And trains are useless for such.) Some kind of ocean-going passenger ship optimized for per-passenger fuel economy probably could beat jumbo jets, but we don't have those kinds of ships. And they wouldn't be very nice: they wouldn't have swimming pools, spas, nice restaurants, etc., and instead would put people into 3-high bunk beds in shared dormitory rooms.