So I just learned that in 2020 ships will be required to reduce their sulfur emissions: https://www.forbes.com/sites/woodmackenzie/2018/09/03/will-imo-2020-int

So I just learned that in 2020 ships will be required to reduce their sulfur emissions: https://www.forbes.com/sites/woodmackenzie/2018/09/03/will-imo-2020-introduce-mayhem-or-opportunity-to-the-refining-and-marine-sectors/#60b8dbed632d https://www.forbes.com/sites/woodmackenzie/2018/09/03/will-i... The will have to use fuel with no more than .5% sulfur, vs. 3.5% previously. This is amazing compared to auto diesel sulfur requirements in the US: 15 ppm.