Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Melbourne found that parks reduce local temperatures by up to 4 degrees Celsius during heatwaves. However, the benefit depends on tree canopy coverage. Areas with less than 30% canopy showed minimal cooling. Interestingly, the study also noted that the presence of water features, like ponds, had a stronger effect than grass alone. But the most surprising finding was that small, scattered gardens in residential streets were more effective at lowering nighttime temperatures than a single large park. This is because they provide continuous shade and moisture throughout the city.
❓ 강의에 따르면, 연구에서 가장 예상치 못한 발견은 무엇이었나요?
A. A. 공원은 기온을 섭씨 4도 낮춥니다.
B. B. 물의 요소는 잔디보다 공기를 더 시원하게 만든다.
C. C. 작은 길거리 정원들이 하나의 큰 공원보다 야간 기온을 더 효과적으로 낮춘다.
D. D. 수관 피복률이 30% 미만이면 효과가 거의 없다.
✅ 正确答案
C. Small street gardens cool nighttime temperatures better than one big park.