Gardening season is in full swing, and folks are ready to buy the essentials, such as natural fertilizers. Yet, buyers should beware. A national study conducted by the Ann Arbor-based Ecology Center and the Sierra Club found a number of top-selling fertilizers contain the "forever chemicals" known as PFAS. Jeff Gearhart is research director for HealthyStuff.org at the Ecology Center. He joined WEMU's David Fair to discuss the findings and the measures needed to protect us from these harmful chemicals.