Two earlier business decisions by the "Chicago Sun-Times" led to substantial savings of time and money during the Trump Tower's construction. The original 1950s sea wall was built by the newspaper company to bomb-shelter thickness, to withstand a Cold War attack, and thus did not have to be broken down and rebuilt. Furthermore, the company decided in the 1970s to switch from petroleum-based to soy-based ink, which reduced ground pollution from the printing plant. This considerably reduced the costs and time for cleaning up the site prior to building anew.