Automaking is such an all-pervasive industry that fortunes can be made and lost on the winks of Detroit's Big Three. Lately there has been considerable speculation on just how seductively they are winking at the precious and relatively obscure metal platinum. On the one hand, platinum is the leading candidate to serve as the active agent in an anti-pollution device that will probably have to be installed on all new cars beginning in 1975. But hundreds of scientists are trying to find another, cheaper substance that will do the same job. If they succeed, the platinum market will probably...
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