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.
❓ What did the study in Melbourne reveal about green roofs?
A. They are cheaper to install than traditional roofs.
B. They are more expensive in the long run.
C. Their installation cost is higher, but they save money over time.
D. They only work in warm climates.
✅ 正确答案
Their installation cost is higher, but they save money over time.