雅思听力

🎧 Listening Transcript

Good morning, everyone. Today we'll discuss urban planning, focusing on green spaces. A recent study in Melbourne found that parks reduce city temperatures by up to 3 degrees Celsius during heatwaves. However, the key factor isn't park size but tree density. Dense tree canopies provide more shade, which lowers the ground temperature. The study also noted that adding water features, like fountains, can boost cooling by an extra 10 percent. But these require significant maintenance, so planners often prefer simple lawn areas. Nevertheless, for maximum benefit, experts recommend mixing trees with permeable surfaces, such as gravel, to improve water absorption.