雅思听力

🎧 Listening Transcript

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.