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-radiate heat. One effective mitigation strategy is increasing green spaces, such as parks and green roofs. However, a recent study found that the cooling effect of parks depends significantly on their size and the density of trees. Small parks with scattered trees provide limited relief, while large, densely wooded parks can lower local temperatures by up to 5 degrees Celsius. Additionally, reflective materials on buildings and pavements can reduce heat absorption, but they are less effective than vegetation in promoting evaporation.
❓ 강의에 따르면, 최근 연구는 공원과 그 냉각 효과에 대해 무엇을 밝혀냈습니까?
A. A. 모든 공원은 크기에 관계없이 동일하게 온도를 낮춘다.
B. B. 빽빽한 나무가 있는 대형 공원이 냉각 효과에 가장 효과적이다.
C. C. 반사 재료가 식생보다 더 효과적이다.
D. D. 나무가 흩어져 있는 작은 공원은 기온을 5도 낮춘다.
✅ 正确答案
B. Large parks with dense trees are most effective at cooling.