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 coverage by just 10% can reduce local temperatures by up to 2 degrees Celsius during summer heatwaves. However, the researchers noted that the effect varies depending on tree species and placement. For example, deciduous trees planted on the western side of buildings provide shade in the afternoon, while evergreen trees are more effective for windbreaks in winter. Interestingly, the study also highlighted that parks with a mix of grass and trees had higher biodiversity than those with only trees. So, when designing sustainable cities, we must consider both thermal benefits and ecological impacts.