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<p>[QUOTE=&quot;bigjpst, post: 978242, member: 21015&quot;]To a point this may true, but for the past 5-10 years automobile catalytic converters have been getting smaller and Rhodium and Cerium are used to store O2 and reduce oxides of Nitrogen. More sophisticated electronics and internal engine designs do just as much to reduce emissions. There is also a considerable amount of recycling done on automotive catalytic converters and O2 sensors.[/QUOTE]</p><p><br /></p>

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