Which statement best describes strategies to address urban heat island effect in buildings?

• A. Increasing rainfall in urban cores.
• B. Urban areas getting hotter due to dense surfaces; green roofs, shading, and reflective surfaces mitigate.
• C. Reducing insulation levels.
• D. Maximizing glass facade area.

Answer: (B)

The goal is to reduce heat gain in buildings and improve outdoor cooling in dense urban areas. In cities, dark, dense surfaces like concrete and asphalt soak up heat and radiate it back, creating higher temperatures known as the urban heat island effect. Strategies that counteract this focus on lowering heat absorption and increasing cooling: green roofs add vegetation and soil that cool through evaporation and provide extra insulation; shading from trees, awnings, and other forms of shading blocks sunlight from reaching surfaces and entering spaces; and reflective or light-colored surfaces (cool roofs and reflective pavements) bounce more solar energy back into the sky, reducing heat gain. Together, these approaches address how heat is absorbed and retained in buildings and the surrounding environment, making them effective ways to mitigate urban heat. The other options don’t tackle these mechanisms: increasing rainfall isn’t a controllable building strategy, reducing insulation makes cooling harder and energy use higher, and maximizing glass facades increases solar gain and heat absorption.