Nitrogen oxide emissions from transportation in the European Union 1990-2021
Transportation in the European Union (EU-27) produced roughly 2.4 million metric tons of nitrogen oxide (NOx) in 2021. Road transportation accounts for 85 percent of EU-27 transportation-related NOx emissions.
Since 1990, transportation-related NOx emissions have declined by more than 65 percent. Furthermore, road transportation accounts for around 85 percent of the European Union's total transportation NOx emissions.