雅思听力

🎧 Listening Transcript

Good morning. Today, in our environmental science lecture, we're going to discuss urban heat islands. As you know, cities are often warmer than surrounding rural areas. This is mainly due to concrete and asphalt absorbing heat during the day and releasing it slowly at night. However, one effective mitigation strategy is increasing green spaces, such as parks and rooftop gardens. Interestingly, a recent study in Melbourne found that adding just 10% more tree cover could reduce surface temperatures by up to 2.5 degrees Celsius during summer. But the study also noted that the cooling effect is strongest within 100 meters of the green area. Therefore, planners should distribute small parks evenly rather than concentrating them in one large zone.