雅思听力

🎧 Listening Transcript

Today in our environmental science lecture, we'll discuss the impact of urban green spaces on local climates. Recent studies show that parks and gardens can reduce surrounding temperatures by up to 5 degrees Celsius during heatwaves, mainly through shade and evapotranspiration. Additionally, these areas improve air quality by absorbing pollutants like nitrogen dioxide and particulate matter. However, the effectiveness depends on several factors, including the size of the green space, the types of trees planted, and the local wind patterns. For instance, a dense canopy of deciduous trees is more effective in summer, while evergreen trees provide year-round benefits. City planners should consider these when designing new parks.