Researchers from the Federal University of Technology in Owerri, Nigeria, have identified a promising strategy for reducing diesel engine pollution without compromising performance. They used a technology called water in diesel emulsion (WiDE), which adds small amounts of water to diesel fuel to reduce harmful emissions while maintaining engine efficiency. The researchers found that WiDE could offer a simpler and cleaner alternative that can work in existing diesel engines without major hardware changes. The technology involves tiny droplets of water mixed into diesel fuel and special chemicals like surfactants to keep the mixture evenly blended, allowing it to remain stable for up to 60 days. The study found that engines using WiDE can achieve significant reductions in harmful pollutants, including nitrogen oxide emissions by 67% and particulate matter by 68%. The researchers also noted improvements in brake thermal efficiency, which indicates that engines are making better use of the fuel being burned.