Today in our environmental science lecture, we're discussing the impact of urban development on local wildlife. One key finding is that green roofs, which are covered with vegetation, can significantly reduce the heat island effect in cities. However, their effectiveness depends on the types of plants used. Native species, for example, require less water and provide better habitats for insects. In a recent study, researchers compared two buildings in Manchester: one with a green roof of sedum, a common succulent, and another with a mix of wildflowers. They found that the wildflower roof attracted three times more bee species. But the sedum roof was more effective at cooling the building, lowering the internal temperature by up to 2 degrees Celsius. So, while wildflowers support biodiversity, sedum is better for energy efficiency.
❓ According to the lecture, what did the study in Manchester reveal about the wildflower roof compared to the sedum roof?
A. A. It attracted more bee species but was less effective at cooling.
B. B. It required less water and provided better habitats for insects.
C. C. It reduced the building's temperature by more than 2 degrees Celsius.
D. D. It was more effective at supporting both biodiversity and energy efficiency.
✅ 正确答案
A. It attracted more bee species but was less effective at cooling.