Today in our environmental science lecture, we'll discuss urban green spaces. Researchers have found that parks and community gardens can significantly reduce the urban heat island effect. For example, a study in Melbourne showed that increasing tree canopy by 20% could lower daytime temperatures by up to 2.5 degrees Celsius. However, the key factor is not just the number of trees, but their placement. Trees planted along streets and around buildings provide more cooling than those clustered in a single large park. Additionally, green roofs and vertical gardens on high-rise buildings are becoming increasingly popular, though they require more maintenance and are more expensive to install.
❓ Giảng viên nói yếu tố quan trọng nhất trong việc giảm hiệu ứng đảo nhiệt đô thị là gì?
A. A) Tổng số cây xanh trong thành phố
B. B) Vị trí của cây xanh trong thành phố
C. C) Việc sử dụng mái nhà xanh trên tất cả các tòa nhà