One insect with a massive impact—both positive and negative—is the mosquito.
Why it has a huge impact:
· Negative: It is the deadliest animal to humans worldwide, causing millions of deaths annually by transmitting diseases like malaria, dengue, Zika, and yellow fever.
· Positive: Ecologically, mosquitoes serve as a food source for many species and, as larvae, help filter water systems.
No other insect affects human health, economies, and ecosystems on such a scale.