In a debate about environmental research, the first scientist argues that studies on air pollution primarily focus on urban areas, neglecting rural populations. For instance, the impact of vehicle emissions is often assessed only in cities, while the effects on rural communities are overlooked. Government-funded environmental research should include studies on rural air quality. The second scientist counters that focusing on urban versus rural populations is irrelevant to scientific inquiry.

Which of the following responses, if true, most effectively challenges the second scientist's claim?