And that would be just 15 of the largest ships, with 100,000 other big commercial ships out there burning an especially polluting type of diesel fuel: "The wor

And that would be just 15 of the largest ships, with 100,000 other big commercial ships out there burning an especially polluting type of diesel fuel: "The world shipping fleet consists of over 100,000 vessels larger than 100 gross tonnes ... Oceangoing ships running large slow-speed diesel (SSD) engines generally burn low-quality residual fuels that tend to contain high amounts of sulfur and heavy metals. Smaller vessels, such as tugboats, fishing vessels and ferries operate medium-speed diesel (MSD) engines that use mostly distillate fuels within nonroad equipment fuel quality standards [U.S. Environmental Protection Agency, 2004]. International commercial shipping vessels operate across international waters with little or inconsistent regulation of fuel quality or pollution emissions".* * Particulate emissions from commercial shipping: Chemical, physical, and optical properties http://earthjustice.org/sites/default/files/black-carbon/lack-et-al-2009.pdf http://earthjustice.org/sites/default/files/black-carbon/lac...