"Air pollution from cars and factories has been regulated in much of the world since the 1970s. When it comes to the smoke-belching ships that carry global trade, the rules have been a lot looser.
Big changes start next January, though, when long-debated standards from the International Maritime Organization mandate steep cuts of sulfur emissions associated with respiratory disease and acid rain. Much tougher rules are supposed to take effect in 2050, when the IMO will require ships also reduce carbon dioxide emissions by at least half.
By itself, next year’s cap could prevent 150,000 premature deaths and millions of childhood asthma cases each year, according to research published in the journal Nature. It will also cost tens of billions of dollars for an industry that’s dragged its feet on the environment."
Kyunghee Park and Jason Clenfield report for Bloomberg January 17, 2019.