To what extent does industrial farming impact farmers, the environment, and public health? Are factory animals treated inhumanely? What are the long-term effects of hog farms on water and air quality? This necessary edition offers the reader not only a full spectrum of dissent on factory farming, but also the ability to test the validity of arguments by following up on sources used as evidence. Includes primary and secondary sources from a variety of perspectives including eyewitnesses, scientific journals, and government officials.