Articles and studys in soport of the progeram

http://www.rff.org/documents/RFF-DP-98-23.pdf  Fleet Turnover and Old Car Scrap Policies Anna Alberini Winston Harrington Virginia McConnell Despite dramatic reductions in "new car" emissions standards over the past 20 years vehicle emissions continue to be a major source of urban air pollution in the U.S.		.
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