雅思听力

🎧 Listening Transcript

Today, in our environmental science lecture, we're discussing the impact of urban green spaces. A recent study from the University of Melbourne found that increasing tree coverage in city centers can reduce local temperatures by up to 2.5 degrees Celsius during summer. This cooling effect is mainly due to shade and evapotranspiration. Interestingly, the study also showed that parks with a mix of native and exotic trees attract more bird species than those with only native trees. However, the researchers emphasized that maintenance costs are often underestimated, especially for watering young trees in dry periods. They recommend using drought-resistant species to lower long-term expenses.