Texas A&M University (TAMU) LAND240 History of Landscape Architecture Practice Exam

One of the main functions of green roofs in urban landscapes is to improve air quality and reduce heat. Green roofs achieve this through several mechanisms. They help to filter pollutants from the air, as plants absorb carbon dioxide and release oxygen during photosynthesis. The vegetation also contributes to lower temperatures in urban areas, known as the urban heat island effect, by providing shade and through the process of evapotranspiration, where moisture is released from plants into the atmosphere. This cooling effect not only enhances comfort for residents but also can reduce energy demand for air conditioning in nearby buildings, contributing to overall energy efficiency.

In contrast, while maximizing building height, serving as private outdoor spaces, and hiding utility equipment are considerations in urban design, they do not capture the essential environmental benefits that green roofs specifically provide. Their primary role focuses on ecological advancement and improving livability in dense urban environments rather than simply modifying structural features or serving aesthetic purposes.