GRA
Well-known member
Via GCC: http://www.greencarcongress.com/2017/10/20171010-fotw.html
Highway vehicles are responsible for a declining share of pollutants in the US, according to data gathered by the US Department of Energy (DOE).
- More than half of all carbon monoxide (CO) emissions in 2002 were from highway vehicles; by 2016 that fell to 30%.
The share of nitrogen oxides (NOx) emissions from highway vehicles declined from 43% of all NOx emissions in 2002 to 34% in 2016.
The highway share of volatile organic compound (VOC) emissions declined by 9% during this same period.
Highway vehicles contributed less than 3% of all particulate matter (PM) emissions.