Indicator air

Nitrogen oxide emissions

The term "nitrogen oxides" (NOx) embraces nitrogen dioxide (NO2) and nitrogen monoxide (NO). Nitrogen oxides form in the combustion of transport and heating/process fuels, especially when combustion is at high temperatures. Road transport is the main source. NOx is an important precursor in the formation of acid rain, secondary aerosols and - in combination with volatile organic compounds - photo-oxidants (ozone/summer smog).

Nitrogen oxide emissions (NOx)* 2018: 72.6 Nitrogen oxide emissions (NOx)* 2017: 75.9 Nitrogen oxide emissions (NOx)* 2016: 78.9 Nitrogen oxide emissions (NOx)* 2015: 79.7 Nitrogen oxide emissions (NOx)* 2014: 82.4 Nitrogen oxide emissions (NOx)* 2013: 85.7 Nitrogen oxide emissions (NOx)* 2012: 85.6 Nitrogen oxide emissions (NOx)* 2011: 85.9 Nitrogen oxide emissions (NOx)* 2010: 88.9 Nitrogen oxide emissions (NOx)* 2009: 88.8 Nitrogen oxide emissions (NOx)* 2008: 91.5 Nitrogen oxide emissions (NOx)* 2007: 93.1 Nitrogen oxide emissions (NOx)* 2006: 95.2 Nitrogen oxide emissions (NOx)* 2005: 97.3 Nitrogen oxide emissions (NOx)* 2004: 97.6 Nitrogen oxide emissions (NOx)* 2003: 99.5 Nitrogen oxide emissions (NOx)* 2002: 102.3 Nitrogen oxide emissions (NOx)* 2001: 108.1 Nitrogen oxide emissions (NOx)* 2000: 111.7 Nitrogen oxide emissions (NOx)* 1999: 113.2 Nitrogen oxide emissions (NOx)* 1998: 113.7 Nitrogen oxide emissions (NOx)* 1997: 113.6 Nitrogen oxide emissions (NOx)* 1996: 118.8 Nitrogen oxide emissions (NOx)* 1995: 122.4 Nitrogen oxide emissions (NOx)* 1994: 124.4 Nitrogen oxide emissions (NOx)* 1993: 128.3 Nitrogen oxide emissions (NOx)* 1992: 135.1 Nitrogen oxide emissions (NOx)* 1991: 140.8 Nitrogen oxide emissions (NOx)* 1990: 144.1
* The sum of nitrogen oxide (NO) and nitrogen dioxide (NO2) expressed as NOx

Data for the graph: Excel
Source: FOEN
Method

Emissions are determined by multiplying the annual human activity rates by pollutant-specific emission factors. Data are gathered by means of surveys, modelling and calculations. As NO oxidises quickly to NO2, total emissions are stated as nitrogen dioxide (NO2) equivalents.

 
Last updated on: 17.02.2020

Further information

Links

inidkatoren_hirun

Indicators

Search and list of all indicators

https://www.bafu.admin.ch/content/bafu/en/home/themen/thema-luft/luft--daten--indikatoren-und-karten/luft--indikatoren/indikator-luft.pt.html/aHR0cHM6Ly93d3cuaW5kaWthdG9yZW4uYWRtaW4uY2gvUHVibG/ljL0FlbURldGFpbD9pbmQ9TFUwMTQmbG5nPWVuJlN1Ymo9Tg==.html