Michigan is getting tougher on factory farms, and how they deal with animal waste.

There has been a years-long legal battle between state environmental regulators and farming interests over the enforcement of the strict pollution regulations that were announced in 2020.

Bridge Michigan reports that confined animal feeding operations, or CAFOs, are now banned from spreading manure on farm fields in the state during the winter months. This move is aimed at keeping animal waste out of the state’s waterways.

The state’s CAFOs have more than tripled in the last 25 years, and generate more feces and urine than the entire human population of Michigan.