It took more than 80 hours to install what Royal Caribbean officials said is the largest single glass and steel structure to be lifted onto a cruise ship, standing at 82 feet tall and 164 feet wide.

I’m on a cruise ship in the Caribbean, and it’s almost showtime. I take a seat. Not in a lounge or theatre but on deck, where the action is about to unfold. And by action, I mean sails.

There are two other engines used on bulk carriers or container ships that emit less methane but they are too tall to fit in a cruise ship ... greenhouse gases than very low sulfur fuel oil ...