Today in our environmental science lecture, we'll discuss urban heat islands. Cities tend to be warmer than surrounding rural areas because concrete and asphalt absorb and re-emit heat. One surprising solution is green roofs, which are covered with plants. A study in Chicago found that green roofs can reduce building temperatures by up to 5 degrees Celsius, cutting air conditioning costs by 20%. However, the initial installation is expensive, and maintenance requires regular watering. Despite this, many cities now offer tax incentives to encourage adoption.
❓ Según la conferencia, ¿cuál es uno de los beneficios de los techos verdes mencionados?
A. A. Reducen la contaminación del aire urbano.
B. B. Reducen los costos de refrigeración de los edificios.