Diesel Exhaust Fluid (DEF) is a urea-based solution injected into the exhaust stream of diesel engines to reduce nitrogen oxide (NOx) emissions. This process, known as Selective Catalytic Reduction (SCR), converts NOx into harmless nitrogen and water. Modern diesel vehicles, particularly those manufactured after 2010, are often equipped with SCR systems that require DEF to meet stringent emissions regulations.
The implementation of DEF and SCR technology has significantly decreased air pollution from diesel engines, contributing to improved air quality and public health. These technologies were introduced to comply with increasingly strict environmental standards aimed at reducing harmful pollutants. The costs associated with DEF are generally considered a necessary expense for operating diesel vehicles and contribute to a cleaner environment.
