1. also consider local and regional levels of pounds carbon monoxide and carbon
2. ozone carbon monoxide toxic compounds dioxide than gasoline vehicles but more
3. and PM and global climate change. nitrogen oxides and PM than gasoline vehi-The impact of diesel and reformulated cles with state-of-the-art control systems
4. gasoline vehicles appear similar and changes (40). More data on current and future
5. to current uncertainties could easily affect diesel vehicles is needed to assess the effect