In “How Trump E.P.A. Is Giving Up Role of U.S. Protector” (front page, Aug. 4), about the recent E.P.A. reversal of its previous finding that climate change is endangering the American people, David ...

Life would be impossible without experts — doctors help us when we get sick, mechanics fix our cars when they break down, farmers produce our food, to name just a few. But we live in a time when too ...