Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Melbourne found that increasing tree canopy cover by just 10% can reduce local temperatures by up to 2.5 degrees Celsius during heatwaves. This happens because trees provide shade and release moisture through transpiration. However, the study also noted that the benefits are strongest in densely built areas with limited existing vegetation. Researchers recommend prioritizing planting in low-income neighborhoods, where green space is often scarce, to maximize both cooling and social equity benefits. They also warn that maintenance costs can be high, so choosing drought-resistant species is crucial for long-term success.
❓ According to the lecture, what did the study in Melbourne reveal about a 10% increase in tree canopy cover?
A. A. It reduces city temperatures by exactly 2.5 degrees in all areas.
B. B. It can lower local temperatures by up to 2.5 degrees during heatwaves.
C. C. It has no effect in densely built areas.
D. D. It increases humidity levels significantly in low-income neighborhoods.
✅ 正确答案
B. It can lower local temperatures by up to 2.5 degrees during heatwaves.