雅思听力

🎧 Listening Transcript

Today in our environmental science lecture, we'll discuss the impact of urban green spaces. A recent study in Melbourne found that parks can reduce local temperatures by up to 4 degrees Celsius during heatwaves. However, the effect depends on the size and vegetation density. Small gardens with scattered trees have minimal cooling, while large connected parks with dense canopy and water features create significant cooling zones. The study also noted that residents living within 500 meters of such green areas reported better sleep quality and lower stress levels. Interestingly, the cooling benefit extends only about 300 meters beyond park boundaries, so city planners should prioritize creating multiple medium-sized parks rather than one huge central park.