In today's lecture, we'll discuss the impact of urban green spaces on mental health. A recent study conducted in Melbourne followed 1,000 residents over five years. The researchers found that people living within 300 meters of a park reported 20% lower stress levels. Interestingly, the size of the green space mattered less than its accessibility. However, the study also noted that the benefits were stronger for older adults, especially those over 65, who showed a 30% improvement in mood. The researchers suggest that city planners should prioritize creating small, nearby gardens rather than large, distant parks.