In today's lecture, we'll discuss the impact of urban green spaces on mental health. Recent studies show that access to parks and gardens can reduce stress levels significantly. However, the key factor isn't just the presence of green areas, but their accessibility. For instance, a study in Melbourne found that residents living within 300 meters of a park reported lower anxiety, but only if the park had seating and shaded paths. Interestingly, the size of the park mattered less than its design. Small, well-maintained pocket parks were more effective than large, neglected ones. So, city planners should focus on creating inviting, safe green spaces rather than just expanding their total area.