Cleaner diesel engines: Pouring water on troubled oils

http://www.economist.com/node/16271415

/ University of Delaware soot ships diesels 60,000 deaths heart lung disease annually dirty ships oxides of nitrogen smog land pollution is cleaned up emissions funnels seagoing cargo vessels incomplete combustion long chain hydrocarbons fuel burn easily lighter fractions petrol carbon soot carbon dioxide CO2 oxygen air mixing water burn better heat combustion breaks water molecules hydrogen atoms split hydrocarbon molecules, making them more combustible /