Today in our environmental science lecture, we're discussing the impact of urban development on local wildlife. One key point is that many cities have introduced green roofs, which are covered with vegetation. These roofs not only reduce heat absorption but also provide habitats for insects and birds. However, a recent study in London found that while green roofs attract more species than traditional flat roofs, they don't support the same diversity as natural ground-level habitats. The researchers suggest that to maximize biodiversity, we should connect green roofs with ground-level parks through 'green corridors'. Unfortunately, this is often overlooked in city planning due to cost and space constraints.
❓ 最近在伦敦进行的研究揭示了关于绿色屋顶的哪些发现？
A. 它们比自然地面栖息地支持更多的物种。
B. 它们吸引的物种数量少于传统的平屋顶。
C. 它们的生物多样性高于地面公园，但低于自然栖息地。
D. 对大多数城市规划者而言，它们过于昂贵，难以纳入考虑范围。
✅ 正确答案
They have higher biodiversity than ground-level parks but lower than natural habitats.