When EURO VI emissions legislation was introduced in 2013 (and then mandatory in 2014) it saw an 80% reduction in NOx emissions from 2.0 g/kWh to 0.4g/ kWh and a halving of the particulate matter from 0.02 g/kWh to 0.01g/Kwh (figures 1 and 2) compared to EURO V. Overall since the introduction of EURO 0 in 1990 this is a reduction of over 99% in particulate matter and a 97% reduction in NOx.
