MAR 2 1971, MAR 4 1971; Plate Recycling Slated; Walter Fox, left, Denver Post Office superintendent

MAR 2 1971, MAR 4 1971; Plate Recycling Slated; Walter Fox, left, Denver Post Office superintendent of vehicle operations, and Joseph Harlan, a postal driver, unload carts containing nearly 4,000 license plates at the National Metal Processing Co., 1919 7th St., for trip that eventually will lead to CF&I Steel Corp. in Pueblo for shredding and reprocessing for use again. Fox said Post Office employes collected plates in cooperation with the Educated Consumers Organization (ECO) campaign to harvest old plates for ecological drive.; (Photo By David Cupp/The Denver Post via Getty Images)