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. However, one surprising factor is the role of green spaces. A recent study in Melbourne found that parks can reduce local temperatures by up to 4 degrees Celsius, but only if they are larger than 2 hectares. Smaller gardens have a negligible effect. Additionally, the study showed that trees along streets are more effective at cooling than grassy areas, due to shade and evapotranspiration. This has implications for city planning, especially in densely populated districts.
❓ 강의에 따르면, 멜버른에서의 연구는 녹지 공간에 대해 무엇을 발견했습니까?
A. A) 2헥타르 미만의 공원은 기온을 크게 낮춘다.
B. B) 가로수는 잔디 지역보다 냉각 효과가 더 효과적이다.
C. C) 녹지 공간은 도시 열섬 현상에 영향을 미치지 않는다.
D. D) 더 큰 공원은 지역 기온을 최대 4도까지 상승시킵니다.
✅ 正确答案
B) Street trees are more effective at cooling than grassy areas.