Good morning, everyone. Today, in our environmental science lecture, we will discuss the impact of urban green spaces on city temperatures. A recent study in Melbourne found that parks can reduce surrounding temperatures by up to 4 degrees Celsius during heatwaves. Interestingly, the cooling effect extends about 100 meters beyond the park boundary. However, the effectiveness depends on factors like tree canopy density and water features. For example, areas with dense trees and ponds showed a stronger cooling effect than areas with only grass. The study also noted that nighttime cooling was more significant than daytime cooling, which is crucial for reducing heat stress during summer nights.
❓ According to the lecture, what did the study in Melbourne find about the cooling effect of urban green spaces?
A. A. The cooling effect is limited to the park area itself.
B. B. The cooling effect is stronger at night than during the day.
C. C. Grass areas provide more cooling than tree-covered areas.
D. D. The cooling effect only works during heatwaves.
✅ 正确答案
B. The cooling effect is stronger at night than during the day.