Until reading the first chapter of Susan Freinkel’s new book, you might not realize just how many things in your life are made of plastic, from your gym clothes to your refrigerator. But what does all this new  – and sometimes life-saving, or at least life-altering  – material mean for how we live our lives? And what are the consequences of a single-use culture? We talk with Freinkel about her new book, “Plastic: A Toxic Love Story.”