The article refers to the environment. He was awarded the Knight Public Journalism Fellowship for the Center for Disease Control Foundation. He was also trained at the US Centers for Disease Control. It's clear that Walsh knows exactly what he's talking about. The author demonstrates a higher level of expertise because he is a senior writer for TIME. You will be inclined to listen to experts when seeking information. Walsh presents a fair argument because he mostly talks about the inconveniences that the audience will find interesting. When Walsh states, “There are more than 1,200 pesticides currently registered for use in the United States; no one expects that the number will decrease” shows a more negative side. The author's tone of voice contributes to his credibility because he is knowledgeable. Since the writer deals with a controversial topic, the audience is willing to listen to him and will consider him honest and