Clean fuels are needed to achieve clean air. The CAA thus provides for:
- The complete phase out of leaded gasoline before the end of the year 2000;
- The lowering of the sulfur content of industrial and automotive diesel, respectively, from 0.5% to 0.3% and from 0.2% to 0.05%.
- The lowering of aromatics in unleaded gasoline from 45% maximum to 35% maximum; and the lowering of benzene in unleaded gasoline from 4% maximum to 2% maximum.
Further improvement on the fuel quality, excluding cleaner alternative fuels, will be spearheaded by the Department of Energy.
Department of Environment and Natural Resources. (2003, August). Primer on the Clean Air Act. Diliman: DENR-Public Affairs Office.