雅思听力

🎧 Listening Transcript

Today, in our environmental science lecture, we'll discuss urban heat islands. These are areas in cities that are significantly warmer than surrounding rural regions. One major cause is the replacement of natural surfaces with concrete and asphalt, which absorb and retain heat. Another factor is the lack of vegetation, as trees provide shade and release moisture through transpiration. Interestingly, the temperature difference can be as much as 5 to 10 degrees Celsius at night. To mitigate this effect, some cities are implementing green roofs and increasing urban tree cover. However, these solutions require careful planning and investment.