雅思听力

🎧 Listening Transcript

Today, in our environmental science lecture, we'll discuss the impact of urban green spaces. A recent study in Melbourne found that increasing tree coverage by 20% could reduce local temperatures by up to 2 degrees Celsius during heatwaves. This is because trees provide shade and release moisture through transpiration. However, the study also noted that the effectiveness depends on the type of trees. Native species, such as eucalyptus, are more drought-resistant and require less water, making them more sustainable for long-term urban planning. Non-native species, while providing quick shade, often need intensive irrigation, which can strain city water supplies. So, for future projects, city planners should prioritize native trees to maximize both cooling and environmental benefits.