• Palladium
  • More than half the supply of palladium and its congener platinum is used in catalytic converters , which convert as much as 90% of the harmful gases in automobile exhaust ( hydrocarbons , carbon monoxide , and nitrogen dioxide ) into less noxious substances ( nitrogen , carbon dioxide and water vapor ). (wikipedia.org)
  • Palladium is a soft silver-white metal that resembles platinum. (wikipedia.org)