GE Reports Article - must read by Brendan Coffey
With Broadway shows, racetracks, Michelin-star chefs and as many as 9,000 passengers and crew members, cruise ships often live up to their “floating cities” nickname. Unfortunately, they’re like cities in another way, too: They’re massive producers of greenhouse gases and air pollution from using marine diesel, a heavier version of what powers diesel trucks and cars. A 2017 study found one cruise line’s operations in Europe emitted 10 times more air-polluting particulate matter than the continent’s 260 million cars did that year.

GE Reports - Video link
This complementing video shares the personal views and comments by both Nedstack and GE and comes recommended:
https://www.facebook.com/GE/videos/533801987401733/