Good morning, class. Today we're discussing 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 among residents. For example, a 2021 study in Melbourne found that people living within 300 meters of a park reported 20% lower anxiety scores. However, the researchers noted that the quality of the green space matters more than its size. A well-maintained garden with benches and walking paths has a stronger positive effect than a large, neglected area. Also, adding water features like ponds or fountains can further enhance the calming effect.