雅思听力

🎧 Listening Transcript

Today in our environmental science lecture, we'll discuss the impact of urban green spaces. Recent studies show that parks and community gardens can reduce local temperatures by up to 3 degrees Celsius during heatwaves. However, the benefit depends on the size and density of vegetation. For example, a single large park has a greater cooling effect than several small scattered ones. Additionally, trees with broad leaves provide more shade and evaporative cooling than conifers. Interestingly, the placement of green spaces near buildings is crucial; those on the windward side can channel cooler air into residential areas. So, city planners should prioritize creating large, leafy parks strategically located to maximize airflow.