AdBlue converts harmful NOx from your diesel vehicle exhaust into harmless nitrogen and steam, therefore considerably reducing the emissions of nitrogen oxides (NOx) that are a major source of atmospheric pollution and that lead to smog in urban centres. According to studies done by the World Health Association, NOx emissions are known to aggravate asthma.
Since 2005, legislation on diesel vehicles in Europe demanded a drastic reduction of NOx emissions. Vehicle manufacturers, and first and foremost those of large goods vehicles, had to re-think the exhaust systems on their vehicles. More and more diesel cars, tractors and other non-road vehicles are also now equipped with the SCR system in the exhaust.