Which of the following is NOT a component of green infrastructure?

The choice of impermeable surfaces is indeed correct as it is not a component of green infrastructure. Green infrastructure aims to manage stormwater, enhance water quality, and improve environmental resilience through natural processes. It includes features that allow for the infiltration, evapotranspiration, and use of rainwater where it falls, which is essential for sustainable urban design.

Impermeable surfaces, such as traditional asphalt or concrete, do the opposite by preventing water from soaking into the ground. This leads to increased runoff, potential flooding, and pollution in water bodies since contaminants are washed away into storm drains. In contrast, components like vegetated swales, permeable pavements, and green roofs are specifically designed to capture and manage stormwater in a way that mimics natural hydrology. They promote infiltration and help manage the urban heat island effect while also providing urban greenspace, improving biodiversity, and enhancing aesthetic value.

In summary, impermeable surfaces lack the characteristics that define green infrastructure, which is focused on sustainability and the natural management of water and ecosystems.