Emissions of Carbon Monoxide
from Highway Vehicles,
1970-2006*
(million short tons)
Source category |
1970 |
1980 |
1990 |
1995 |
2000 |
2005 |
Percent of total, |
||
|---|---|---|---|---|---|---|---|---|---|
| Gasoline powered | |||||||||
| Light vehicles & motorcycles | 119.14 |
98.21 |
67.24 |
46.54 |
36.40 |
24.19 |
50.2% |
||
Light trucks + |
22.27 |
28.83 |
32.23 |
29.81 |
27.04 |
21.19 |
43.9% |
||
Heavy vehicles |
21.27 |
15.35 |
8.92 |
5.96 |
3.42 |
1.97 |
4.1% |
||
Total |
162.68 |
142.39 |
108.39 |
82.31 |
66.86 |
47.35 |
98.2% |
||
| Diesel powered | |||||||||
Light vehicles |
0.01 |
0.03 |
0.04 |
0.02 |
0.01 |
0.01 |
0.0% |
||
Light trucksb |
0.06 |
0.05 |
0.03 |
0.02 |
0.01 |
0.01 |
0.0% |
||
Heavy vehicles |
0.49 |
1.36 |
1.81 |
1.53 |
1.19 |
0.85 |
1.8% |
||
Total |
0.56 |
1.43 |
1.87 |
1.57 |
1.20 |
0.87 |
1.6% |
||
| Total | |||||||||
Highway vehicle total |
163.23 |
143.83 |
110.26 |
83.88 |
68.06 |
48.22 |
100.0% |
||
Percent diesel |
0.3% |
1.0% |
1.7% |
1.9% |
1.8% |
1.8% |
-- |
||
Source: U. S. Environmental Protection Agency, National Emission Inventory Air Pollutant Emission Trends website www.epa.gov/ttn/chief/trends (Additional resources: www.epa.gov/oar/oaqps)
* The sums of subcategories may not equal total due to rounding.
+ Less than 8,500 pounds.
