Key Category Analysis - NOx

The tables below show detailed information on how the key categories for NOx were calculated.

Level

Source Emissions in 2012 (Gg) Proportion NOx
1.A.1.a Public Electricity and Heat Production 301.82 23.78% 23.78%
1.A.3.b.iii Road Transport: Heavy duty vehicles 229.60 15.22% 57.09%
1.A.3.b.i Road Transport: Passenger cars 193.14 15.77% 56.68%
1.A.2.f.i Stationary Combustion in Manufacturing Industries and Construction: Other 78.66 6.20% 63.28%
4.D.1.a Synthetic N-fertilizers 64.68 5.10% 68.38%
1.A.4.b.i Residential: Stationary plants 64.05 5.05% 73.43%
1.A.4.c.ii Agriculture/Forestry/Fishing: Off-road Vehicles and Other Machinery 37.78 2.98% 76.40%
4.D.2.a Farm-level agricultural operations including storage. handling and transport of agricultural products 37.02 2.92% 79.32%
1.A.3.b.ii Road Transport: Light duty vehicles 34.44 2.71% 82.03%
2.B.2 Nitric Acid Production 24.77 1.95% 83.98%
1.A.4.a.i Commercial / Institutional: Stationary 23.21 1.83% 85.81%
2.C.1 Iron and Steel Production 21.64 1.70% 87.52%
2.A.1 Cement Production 17,96 1,42% 88,93%
1.A.3.d.ii National Navigation (Shipping) 17.88 1.41% 90.34%
1.A.2.f.ii Mobile Combustion in Manufacturing Industries and Construction 17.80 1.40% 91.74%
1.A.1.b Petroleum refining 16.50 1.30% 93.04%
1.A.3.c Railways 15.00 1.18% 94.23%
2.A.7.d Other Mineral products 13.07 1.03% 95.26%

Trend

Source Emissions in 1990 (Gg) Emissions in 2012 (Gg) Contribution to trend NOx
1.A.3.b.i Road Transport:. Passenger cars 856.16 193.14 34.52% 34.52%
1.A.3.b.iii Road Transport:. Heavy duty vehicles 452.63 229.60 14.39% 48.91%
1.A.1.a Public Electricity and Heat Production 464.36 301.82 12.76% 61.67%
1.A.2.f.i Stationary Combustion in Manufacturing Industries and Construction: Other 273.42 78.66 10.51% 72.18%
1.A.1.c Manufacture of Solid Fuels and Other Energy Industries 107.18 10.75 4.73% 76.91%
1.A.4.b.i Residential: Stationary plants 90.29 64.05 2.32% 79.23%
1.A.2.a Stationary Combustion in Manufacturing Industries and Construction: Iron and Steel 51.18 3.74 2.30% 81.53%
4.D.1.a Synthetic N-fertilizers 85.31 64.68 2.07% 83.60%
1.A.5.b Other. Mobile (Including military. land based and recreational boats) 40.52 4.82 1.76% 85.36%
1.A.2.f.ii Mobile Combustion in Manufacturing Industries and Construction 46.64 17.80 1.66% 87.02%
1.A.3.c Railways 44.47 15.00 1.64% 88.66%
1.A.4.c.ii Agriculture/Forestry/Fishing: Off-road Vehicles and Other Machinery 58.37 37.78 1.61% 90.27%
1.A.4.a.i Commercial / Institutional: Stationary 47.49 23.21 1.54% 91.81%
1.A.3.d.ii National Navigation (Shipping) 38.70 17.88 1.28% 93.09%
1.A.1.b Petroleum refining 36.84 16.50 1.24% 94.33%
2.A.7.d Other Mineral Products 30.90 13.07 1.06% 95.39%
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