Major Sources of NO Emission
Source category
Emissions (Millions tons per year)
%
Gasoline motor vehicles
7.8
17.53
Diesel, Aircraft , trains, ships
2.0
4.49
Off-highway vehicles
1.9
4.27
Coal
3.9
8.76
Fuel oil
1.3
2.92
Natural gas
4.7
10.56
Wood
0.1
0.22
Total fuel combustion
21.7
48.76
Industrial processes
0.2
0.45
Agricultural burning
0.3
0.67
Solid waste disposal
0.4
0.90
Miscellaneous
Total
44.5
100
