A free presentation on the risks of radon gas will be held at the James Kennedy Public Library in Dyersville. The presentation will be held at 6:30 p.m. Monday, April 13. Staff from the American Lung Association will present this program virtually. Attendees will learn the basics about radon, how it enters a home, its associated health risks and how to effectively reduce radon in a home. The first 50 attendees will receive a free radon test kit. There is a limit of one test kit per household.