雅思听力

🎧 Listening Transcript

Good morning, everyone. Today we'll continue our discussion on urban planning. As we know, many cities face the challenge of balancing growth with environmental protection. One innovative solution is the concept of 'green roofs', which are rooftops covered with vegetation. These roofs not only reduce heat absorption in summer, but also manage stormwater runoff effectively. However, a recent study in Melbourne found that the initial installation cost is about 20% higher than traditional roofs. Yet, over a 30-year period, the savings on energy and maintenance make them more economical. So, despite the upfront expense, the long-term benefits are clear.