Lobbyist: Those who claim that automobile exhaust emissions are a risk to public health are mistaken. During the last century, as automobile exhaust emissions increased, every relevant indicator of public health improved dramatically rather than deteriorated. The flaw in the lobbyist's reasoning can most effectively be demonstrated by noting that, by parallel reasoning, we could conclude that ['people with insurance do not need to lock their doors because if anything is stolen the insurance company will pay to replace it', 'using a cell phone while driving is not dangerous because the number of traffic accidents has decreased since the invention of the cell phone', "smoking cigarettes is not bad for one's health because not all cigarette smokers get smoking-related illnesses", 'inspecting commercial airplanes for safety is unnecessary because the number of commercial airplane crashes has decreased over the last decade']