In today's lecture, we'll discuss the impact of urbanization on local ecosystems. One key point is the role of green roofs. These are rooftops covered with vegetation, which can reduce stormwater runoff by up to 60%. Additionally, they provide habitats for insects and birds, especially in dense city centers. However, the initial installation cost is high, and maintenance requires regular watering, which can be a challenge in dry climates. Despite these drawbacks, many cities now offer tax incentives to encourage their adoption. So, while the upfront expense is significant, the long-term environmental benefits are substantial.
❓ 根据讲座内容，演讲者提到的绿色屋顶的一个主要好处是什么？
A. A. Они значительно уменьшают сток ливневых вод.
B. B. Они снижают стоимость обслуживания зданий.
C. C. Они полностью устраняют необходимость в кондиционировании воздуха.
D. D. Они предоставляют бесплатную воду для орошения.