pollution

Our air was getting cleaner. Now, wildfire smoke has reversed that progress. On this episode, a new University of Iowa study finds wildfires have undone years of gains against ground-level ozone pollution, and the effects are reaching deep into the Midwest. First, we hear from former Iowa residents Jerry and Sue Prothero, who watched ash fall like snow in northern Minnesota. Then, we talk with Jun Wang, the study's lead author, about why ozone pollution is worsening and what it means for Iowans. We also talk with Peter Thorne of the University of Iowa College of Public Health about the health impacts of wildfire smoke and ozone pollution. And we address the health and air quality impacts of a proposed gas plant in Linn County with Abe Kellison of Save Morgan Valley. Save Morgan Valley is a community organization opposing Alliant Energy’s proposed 720-megawatt natural gas power plant in unincorporated western Linn County.

A report from the Iowa DNR shows Iowa had 36 nitrate-related drinking water violations in 2025, which is more than double the number reported in 2024.

The Iowa chapter of the Land Improvement Contractors of America says the space will make it easier to educate the next generation of professional contractors, along with government employees, lawmakers and students, to help conserve soil and water in the state through edge-of-field practices. They're a key part of Iowa's strategy to reduce nutrient pollution.

As President Donald Trump has promised deregulation, experts share what that means for water quality and where regulations already fall short. Farmer and former Iowa Corn Growers Association President Tim Recker has dramatically changed his farm, going no-till and adding wetlands. Water quality proponent Silvia Secchi who gives a history of The Clean Water Act and argues regulations don't go far enough. Also, Nina Elkadi, an investigative reporter, shares her reporting on water quality issues. Then, Melissa Miller, the Iowa Nitrogen Initiative project director, speaks about the complexities of nutrient application on farms and the work they are doing to make this application more accurate. (This episode was produced in March 2025.)

A study by Iowa State University researchers found that using industrial soap to clean plastic in recycling transferred chemicals from the plastic to the water. The findings could help processors remove harmful chemicals from the final recycled product.

Former University of Iowa professor and Democrat Chris Jones announced he's running for Iowa secretary of agriculture. He will face a June primary against Marshalltown-area farmer, Wade Dooley.