Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Melbourne found that adding trees and parks to city centers can reduce local temperatures by up to 4 degrees Celsius during heatwaves. However, the researchers noted that the cooling effect is strongest within 50 meters of the green area, and it diminishes rapidly beyond that distance. They also observed that vertical gardens on building walls are less effective than ground-level parks for heat reduction, but they help improve air quality in narrow streets. The study recommends prioritizing small, distributed green pockets over a single large park to maximize benefits for residents.
❓ According to the lecture, what did the study in Melbourne find about the cooling effect of urban green spaces?
A. A) It is most noticeable within 50 meters of the green area.
B. B) It works better for vertical gardens than for ground-level parks.
C. C) It requires a single large park to be effective.
D. D) It only occurs during the night.
✅ 正确答案
A) It is most noticeable within 50 meters of the green area.