Good morning, everyone. Today, I'd like to discuss the impact of urban green spaces on mental health. Recent studies have shown that even small parks in city centers can significantly reduce stress levels. For example, a research project in Tokyo found that office workers who spent at least 15 minutes a day in a nearby park reported 20% lower cortisol levels compared to those who didn't. However, the key factor is not the size of the space, but the presence of natural elements like trees and water features. Interestingly, the benefits were stronger for people who actively engaged with the environment, such as walking or sitting on a bench, rather than just passing through.
❓ According to the lecture, what is the most important factor in reducing stress through urban green spaces?