A “nutrient exchange” — similar to the “carbon credits” considered a few years ago at the federal level — would be created in Iowa if legislation being developed by Republicans in the Iowa House becomes law. Republican Representative Chip Baltimore of Boone says it’s about sparking “collaboration” rather than confrontation to clean up the state’s surface water.

 

Here’s how a “nutrient exchange” works: a facility that has to get a state permit because it discharges pollution — places like a water treatment plant or a manufacturing facility — enters into a swap with a farmer. The end result? New financing for on-the-farm improvements to reduce nutrient run-off from cropland. Critics like Jessica Mazour of Iowa Citizens for Community Improvement call it “pollution trading.”

 

States like Connecticut, Virginia, Pennsylvania and Ohio have established “nutrient exchanges.” Supporters say it’s a “market-based” way to address the nutrient and sediment loss from farms.