Today in our environmental science lecture, we're discussing the impact of urban development on local ecosystems. One key point is the loss of green spaces, which affects biodiversity. For example, a recent study in Manchester found that the number of bird species decreased by 20% over a decade due to new housing projects. However, the introduction of rooftop gardens in some areas helped to partially offset this decline, attracting insects and small birds again. So, while urban growth is inevitable, careful planning with green infrastructure can mitigate some negative effects.
❓ 맨체스터에서의 연구는 주택 프로젝트의 영향에 대해 무엇을 밝혀냈는가?
A. A. 그들은 조류 종의 수를 20% 증가시켰다.
B. B. 그들은 10년 동안 조류 종을 20% 감소시켰다.
C. C. 그들은 지역 생물다양성에 아무런 영향을 미치지 않았다.
D. D. 그들은 옥상 정원의 도입으로 이어졌다.
✅ 正确答案
B. They caused a 20% decrease in bird species over ten years.