Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Melbourne found that parks with native trees reduce local temperatures by up to 4 degrees Celsius during heatwaves. Interestingly, the cooling effect was strongest within 50 meters of the trees, but it diminished rapidly beyond 100 meters. The researchers also noted that grass areas without shade provided negligible cooling. So, while planting more trees is beneficial, their placement is crucial for maximum impact on city microclimates.
❓ 墨尔本的研究揭示了本土树木的降温效果如何？
A. A. 在距离树木50米以内效果最强，超过100米后迅速减弱。
B. B. 在长达100米的所有距离上，其效果同样显著。
C. C. 这种情况仅在热浪条件下的夜间发生。
D. D. 在草地地区的显著性高于树冠之下。
✅ 正确答案
A. It was strongest within 50 meters of the trees and weakened quickly after 100 meters.