Concentrated animal feeding operations, or CAFOs, are central to Iowa’s rise as an agricultural powerhouse.
As the number of CAFOs skyrocketed, the state’s cancer rates, which have been linked to nitrate pollution from these farm sites, also climbed.
ALT Infographic showing how the number of CAFOs in Iowa have grown since 1990. Text reads
The number of large CAFOs in Iowa has grown more than fivefold since 1990.