https://vibookmark.com/technology/what-is-selective-catalytic-reduction-scr-system/ Selective Catalytic Reduction (SCR) is an advanced emissions control technology that reduces harmful NOx emissions by up to 90%. This process involves injecting a urea-based solution (Diesel Exhaust Fluid – DEF) into the exhaust stream, where it reacts with NOx gases to produce harmless nitrogen and water vapor. Fri, 25 Jul 2025 14:01:52 UTC en