In Chicago, Upton Sinclair spent seven weeks touring the meat packing factories. He interviewed the workers and the owners. What he found was horrific. Neither the workers nor the owners cared what kind of meat was processed- cow, diseased, or human. During one investigation it was noted that a carcass fell into a filthy toilet. The factory workers just picked it up and put the carcass back on the line. The working conditions were more deplorable than the meat. The workers were in the factories ten hours a day, six days a week, standing covered with blood and meat scraps in dark rooms. The rooms were unventilated: sweltering in the summer and freezing in the winter. Most of the workers were immigrants. Not only were the workers taken advantage of by the owners, they were taken advantage of by the real estate agents. The worker’s wages were minimal and almost every cent the workers earned went to pay for their homes. If the workers were unable to pay, they were quickly evicted and replaced with other immigrants. Upton Sinclair knew he had to tell the world about what was really going on in these factories, especially the mistreatment of the workers, so he began to write The Jungle.