Today in our environmental science lecture, we'll discuss the impact of urban green spaces on air quality. A recent study in Melbourne monitored two parks over a year. The researchers found that trees, especially broad-leaved species like oaks, reduced particulate matter by up to 30% near busy roads. However, the effect was only significant within 50 meters of the green area. Interestingly, the study also noted that grass areas had a minimal effect compared to tree canopies. The lead researcher, Dr. Emily Watson, suggests that city planners should prioritize planting clusters of trees rather than isolated ones to maximize air purification benefits.
❓ 講義によると、メルボルンの研究は都市の緑地の効果について何を明らかにしましたか？
A. A. 草地は、汚染を減らす上で樹木よりも効果的でした。
B. B. 木々は交通量の多い道路から50メートル以内の粒子状物質を30%削減した。
C. C. 空気質への影響は、緑地から50メートル以上離れた場所で最も強かった。
D. D. 孤立した木々は、木々の集まりよりも有益であった。
✅ 正确答案
B. Trees reduced particulate matter by 30% within 50 meters of busy roads.