In 2013 the highest NO x emissions were released in transportation and storage, more than a half (51.1%) of total NO x emissions (especially road freight transport); 17.6% of total NO x emissions were contributed by electricity, gas, steam and air conditioning supply, 4.9% by manufacturing and 10.3% by other activities.
Največ NO x , več kot polovica celotne količine emisij teh plinov (51,1 %), je bilo v letu 2013 izpuščenih v zrak v dejavnosti promet in skladiščenje (največ teh plinov je proizvedel cestni tovorni promet); dejavnost oskrba z električno energijo, s plinom in paro je proizvedla 17,6 % celotne količine emisij NO x v zrak, predelovalne dejavnosti 4,9 %, preostale dejavnosti skupaj pa 10,3 %.