books.google.de - To date the investigations of metal emissions from automotive catalysts has focused mainly on platinum. Since 1993, however, platinum has been increasingly replaced by palladium as the predominant substance in pollution-control catalysts. Now the release of palladium in automotive catalysts is becoming...http://books.google.de/books/about/Palladium_Emissions_in_the_Environment.html?hl=de&id=OnNZqylS_Z8C&utm_source=gb-gplus-sharePalladium Emissions in the Environment
