What is a primary method for reducing mosquito populations in urban areas?

Improving drainage systems is a crucial method for reducing mosquito populations in urban areas. Mosquitoes breed in standing water, and urban environments can often collect water in various forms, such as clogged gutters, poorly maintained drainage systems, and other water-retaining features. By enhancing these drainage systems, it becomes possible to effectively manage and redirect water flow, thus eliminating or minimizing the stagnant water that serves as breeding sites for mosquitoes.

This approach not only helps to reduce current mosquito populations but also decreases the likelihood of future infestations. Good drainage can lead to a healthier urban environment by preventing water accumulation where mosquitoes can thrive. Other methods, such as creating artificial ponds, increasing vegetation, or building more wetlands, could potentially provide more breeding sites rather than mitigating them, which is why those options do not effectively address the goal of reducing mosquito populations.