TABLE 4. Emission factors (EF), in grams of emissions produced per kilogram of fuel consumed, for carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), 2.5-micron particulate matter (PM2.5), 10-micron particulate matter (PM10), total particulate matter (PM), nonmethane hydrocarbon (NMHC), volatile organic compounds (VOC), nitric oxide (NOX), organic carbon (OC), and elemental carbon (EC). Data are from Ward and Hardy (1991).

Emission
factors (EF)
CO2
CO
CH4
PM2.5
PM10
PM
NMHC
VOC
NOX
OC
EC
1
1686
55.7
3.0
5.9
7.0
10.0
2.6
3.1
3.9
3.76
0.49
2
1393
213.2
9.9
16.6
19.6
24.5
6.8
8.2
14.9
7.11
0.25
3
1741
26.2
1.7
3.9
4.6
7.3
1.8
2.2
1.8
2.63
0.38
4
1393
213.2
9.9
16.6
19.6
24.5
6.8
8.2
14.9
7.11
0.25
5
1668
65.6
3.4
6.6
7.8
10.9
2.8
3.4
4.6
4.12
0.52
6
1558
124.6
6.0
10.6
12.5
16.4
4.4
5.3
8.7
5.78
0.57
7
1686
55.7
3.0
5.9
7.0
10.0
2.6
3.1
3.9
3.76
0.49
8
1393
213.2
9.9
16.6
19.6
24.5
6.8
8.2
14.9
7.11
0.25