Several major pitfalls developed as the Industrial Revolution progressed. There was a reduction in agriculture as people were abandoning their farms to work in city factories where they could earn a higher income. This led to a shortage a food produced on farms. Increased pollution was a pitfall of the Industrial Revolution. Before the sharp increase in factory numbers, there was a limited amount of pollution generated in the world as production was predominantly manual. The Industrial Revolution provided an incentive to increase profits, and as a result, working conditions in factories deteriorated. Long hours, inadequate remuneration and minimal breaks became the norm. This subsequently led to health issues for many factory workers. Labor movements in the United States developed momentum from the late 19th century in response to poor working conditions that developed during the Industrial Revolution.