The continuous confinement of chickens, pigs, turkeys, cattle, and other animals raised in industrialized agricultural systems jeopardizes the animals’ welfare and degrades the environment. Factory farms produce immense quantities of animal waste and byproducts, which threaten water and air quality and contribute to climate change.
The Humane Society of the United States, "An HSUS Report: The Impact of Industrialized Animal Agriculture on the Environment" (2008). ENVIRONMENT AND HUMAN HEALTH. 2.