Person B: Well, what do you suggest? Wiping out mosquitoes entirely? That would disrupt the entire ecosystem. They're a food source for other animals, like birds and bats. 

 Person B: But who decides which areas are at higher risk? And what about unintended consequences? Messing with nature can have unpredictable outcomes.

 

 Person B: But who decides which areas are at higher risk? And what about unintended consequences? Messing with nature can have unpredictable outcomes.