(Merrillville) Post-Tribune By GitteLaasby, Post-Tribune staff writer email@example.com GARY - For the past year, 220 workers at ArcelorMittal's plate mill in Gary have been the best-kept secret in Northwest Indiana. To them, "green jobs" is more than a catch phrase in a presidential election campaign. It's food on the table every day. Nearly a year ago to the day, the workers rolled their first slab of plate steel at the Gary mill formerly owned by U.S. Steel. ArcelorMittal spent $35 million to revamp and reopen the plant, allowing the company to meet increasing demand from the energy market. Much of the steel is used for windmills, and demand is growing.