No simple solutions for a complex problem

Photo credit: Q K from Pixabay by Jeanine Botta, MPH, Co-founder, The Quiet Coalition When a reader sent a question about sound to The Conversation’s Curious Kids column, editors turned to environmental epidemiologist Erica D. Walker, PhD, to serve as an expert. Ten-year-old Joseph of Chatham, New Jersey, asked, “If all the vehicles in the