Today in our environmental science lecture, we'll discuss urban heat islands. As cities grow, concrete and asphalt replace natural surfaces, absorbing more sunlight and releasing heat at night. This makes cities warmer than surrounding rural areas. One surprising factor is the lack of vegetation. Trees provide shade and release moisture through transpiration, which cools the air. In a recent study of a mid-sized city, researchers found that adding green roofs to 20% of buildings could reduce peak summer temperatures by up to 2 degrees Celsius. However, the effect varies with building height and wind patterns. So, while green infrastructure helps, it's not a complete solution.
❓ 강의에 따르면, 최근 연구는 녹색 지붕을 추가하는 것에 대해 무엇을 발견했습니까?
A. A. 그들은 도시 기온에 큰 영향을 미치지 않는다.
B. B. 건물의 20%에 적용할 경우 여름철 최고 기온을 최대 섭씨 2도까지 낮출 수 있습니다.
C. C. 그들은 높은 건물이 있는 도시에서만 효과적이다.
D. D. 그들은 습도를 증가시키고 도시를 더 따뜻하게 느끼게 한다.
✅ 正确答案
B. They can reduce peak summer temperatures by up to 2 degrees Celsius if applied to 20% of buildings.