"Thinking of going on a cruise for the fresh ocean air? Think again. A recent undercover investigation on P&O Cruises' ship Oceana revealed ultra-fine particles in the air emitted from burning fuel. On deck, downwind of the smokestacks, the investigative team measured 84,000 particulates per cubic cm. Closer to the smokestacks, the numbers rocketed to 144,000. Sometimes even peaking at 226,000. According to Dr. Matthew Loxham, a research fellow in respiratory biology and air pollution toxicology in University of Southampton, 'These are levels that you would expect to see in the most polluted cities.'"



An undercover investigation reveals air quality on a cruise ship deck could be worse than the world’s most polluted cities by Nathaniel Lee (Business Insider)