Seems the source of your "10x" statement is the following report: https://www.maritime-executive.com/article/report-cruise-ships-emitted-more-sox-than-europe-s-

Seems the source of your "10x" statement is the following report: https://www.maritime-executive.com/article/report-cruise-ships-emitted-more-sox-than-europe-s-cars-in-2017 https://www.maritime-executive.com/article/report-cruise-shi... That's a report released in 2019, but the subject is 2017 emissions. Since Jan 1 2020 all vessels are restricted to low sulphur fuel. It used to be up to 3.5% worldwide, now you're only allowed 0.50%. Near EU you were already restricted, seems that was up to 1.5% Unfortunately, reading the article does point to some bad actions: One cruise company seems to be installing scrubbers. They basically take the SOx out of the exhaust (and then dump it somewhere). This is still really bad for the environment, though it makes it appear you abide by the IMO regulations. In any case, SOx emissions should be drastically slower since 2020. Also, further reductions should be possible. This as 0.50 SOx fuel didn't really exist; initially the plan was to mix 3.5% and 0.10% to get to 0.50%. Ideally the IMO now restricts everyone to 0.10% as it'll probably take 10 years again before anything like that takes effect.