Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Melbourne found that adding more parks and trees can reduce local temperatures by up to 4 degrees Celsius during heatwaves. However, the researchers noted that the benefit is only significant when the green area covers at least 30% of a neighborhood. In smaller patches, the cooling effect is minimal, and the cost of maintenance often outweighs the environmental gains. The study also highlighted that native plants require less water and attract more local wildlife, making them a better choice than exotic species for sustainable city planning.
❓ 講義によると、都市の緑地が局所的な気温を大幅に低下させるために必要な条件は何ですか？
A. A. 緑地帯には多種多様な外来植物を含めなければならない。
B. B. 緑地は水域の近くに位置するべきである。
C. C. 近隣地域の少なくとも30%は緑地で覆われていなければならない。
D. D. 維持コストは環境上の利益よりも低くなければならない。
✅ 正确答案
C. At least 30% of the neighborhood must be covered by green areas.