Climate Cast

Minnesota has experienced four significant blowing dust episodes over the past few years, and the uptick in frequency has raised air-quality concerns across the state. Now, the Minnesota Pollution Control Agency will start issuing air quality alerts for blowing dust this summer. Matt Taraldsen, MPCA meteorologist, says the fine particle pollution from dust — technically known as PM10 — is similar to wildfire smoke. “People are very familiar with PM2.5 or fine particle pollution and wildfire smoke,” Taraldsen said. “PM10 can get into the airways and cause inflammation and cardiopulmonary issues even in healthy people — in the right concentrations.”Dust can travel to Minnesota from Texas or Oklahoma, and high winds can blow in dust from North and South Dakota as well. Low snowpack and dryer conditions in the Midwest have contributed to loose soil. “It used to be that we would get snow and it would stay on the ground relatively all winter, and that would prohibit any dust from being lofted because it’s under