credit: Steve Veysey

Cows in a factory farm hooked up for milking

Environmentally Concerned Citizens of South Central Michigan

Farm Sanctuary

Food & Water Watch

GRACE Factory Farm Project

Illinois Environmental Protection Agency

Johns Hopkins University Agriculture & Public Health Gateway

National Agricultural Law Center

The Center to Expose & Close Animal Factories

U.S. Department of Agriculture, Natural Resources Conservation Service

U.S. Environmental Protection Agency, Animal Feeding Operations

U.S. Environmental Protection Agency, Environmental Impacts