Australia had the highest per capita nitrogen oxides (NOx) emissions of all OECD countries in 2021, at kilograms per person. In comparison, NOx emissions in nearby New Zealand were roughly ** kilograms per person. Switzerland had one of the lowest NOx emissions per capita of OECD countries at *** kilograms per person.
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OECD. (January 12, 2023). Per capita nitrogen oxides (NOx) emissions worldwide in 2021, by select country (in kilograms) [Graph]. In ÀÖ²¥´«Ã½app×îа汾. Retrieved August 13, 2026, from /statistics/478834/leading-countries-based-on-per-capita-nitrogen-oxide-emissions/
OECD. "Per capita nitrogen oxides (NOx) emissions worldwide in 2021, by select country (in kilograms)." Chart. January 12, 2023. ÀÖ²¥´«Ã½app×îа汾. Accessed August 13, 2026. /statistics/478834/leading-countries-based-on-per-capita-nitrogen-oxide-emissions/
OECD. (2023). Per capita nitrogen oxides (NOx) emissions worldwide in 2021, by select country (in kilograms). ÀÖ²¥´«Ã½app×îа汾. ÀÖ²¥´«Ã½app×îа汾 Inc.. Accessed: August 13, 2026. /statistics/478834/leading-countries-based-on-per-capita-nitrogen-oxide-emissions/
OECD. "Per Capita Nitrogen Oxides (Nox) Emissions Worldwide in 2021, by Select Country (in Kilograms)." ÀÖ²¥´«Ã½app×îа汾, ÀÖ²¥´«Ã½app×îа汾 Inc., 12 Jan 2023, /statistics/478834/leading-countries-based-on-per-capita-nitrogen-oxide-emissions/
OECD, Per capita nitrogen oxides (NOx) emissions worldwide in 2021, by select country (in kilograms) ÀÖ²¥´«Ã½app×îа汾, /statistics/478834/leading-countries-based-on-per-capita-nitrogen-oxide-emissions/ (last visited August 13, 2026)
Per capita nitrogen oxides (NOx) emissions worldwide in 2021, by select country (in kilograms) [Graph], OECD, January 12, 2023. [Online]. Available: /statistics/478834/leading-countries-based-on-per-capita-nitrogen-oxide-emissions/
