WIUM Tristates Public Radio

US EPA

There are thousands of concentrated animal feeding operations, or CAFOs, around the United States, but no one knows the exact number.

Two Stanford University professors published research this week in the journal Nature Sustainability, saying there’s an easy way to count CAFOs: Teach a computer to do it for them.

The water we drink is protected by federal rules, which are at the crux of a long-running fight over how far upstream that protection extends.

“Agriculture is land and water. When you’ve got control of the water, you’ve got control of the land,” said Blake Roderick with the National Waterways Conference.