Today in our environmental science lecture, we will discuss the impact of urban farming. One key point is that rooftop gardens can reduce a building's energy consumption by up to 25% because they provide natural insulation. However, the initial cost of setting up such a garden is quite high, often exceeding $10,000 for a medium-sized roof. Despite this, many cities offer subsidies to encourage this practice. For example, in New York, a program covers 30% of the installation costs for community gardens. Additionally, these gardens help manage stormwater runoff, which can reduce pressure on city drainage systems during heavy rains.
❓ 讲师提到的屋顶花园的一个好处是什么？
A. 它们能将建筑能耗降低约四分之一。
B. 它们的安装成本不到5000美元。
C. 它们消除了对城市排水系统的需求。
D. 它们在纽约对所有新建筑都是强制性的。
✅ 正确答案
They reduce building energy use by about a quarter.