Today we're discussing the impact of urban green spaces. A recent study in Manchester found that adding trees and parks to city centers can reduce summer temperatures by up to 4 degrees Celsius. This is mainly because plants provide shade and release moisture through transpiration. Interestingly, the effect is strongest within 50 meters of the green area, but it diminishes rapidly beyond that. The researchers also noted that vertical gardens on buildings have a smaller cooling effect compared to ground-level parks, though they save space. However, the study warns that increasing green spaces alone won't solve heat issues unless combined with lighter-colored paving materials.
❓ What did the Manchester study reveal about the cooling effect of urban green spaces?
A. A. Vertical gardens cool more effectively than ground-level parks.
B. B. The cooling effect is most noticeable within 50 meters of green areas.
C. C. Trees reduce city temperatures by 6 degrees Celsius on average.
D. D. Green spaces have no impact on temperature unless combined with light pavements.
✅ 正确答案
B. The cooling effect is most noticeable within 50 meters of green areas.