The main advantages to using emulsified fuels instead of the fuel itself are environmental and economic benefits. Addition of water to the diesel process decreases combustion temperatures and lowers NO emissions. A paper compares water injection and emulsified fuels into diesel engines (marine and stationary engines) and discusses the emissions and mechanisms involved. It concludes that emulsified fuels are singularly effective in simultaneously reducing NO and PM emissions. Another paper has examined the effects of EGR and Emulsion Fuels.