It would become the largest integrated factory in the world by the following decade. Throughout its history, the self-contained Rouge Complex has contained a wide array of industries necessary to produce cars, including steel mills, a tire factory, a glass factory, a power plant and a reception depot for coal, iron ore, rubber and lumber. In the 1930s the complex employed over 100,000 workers. Today the River Rouge Complex continues to evolve to meet the needs of modern manufacturing processes.