Urban areas are getting hotter, causing problems like higher energy use and worse air quality. To combat this, scientists studied ways to cool cities down. They found that using cool materials and planting more greenery can help. By using computer models and real-world data, they discovered that having lots of greenery, like trees and green roofs, makes people feel more comfortable in the city. So, planting more trees and creating green spaces can make cities cooler and more pleasant for everyone.