In today's lecture, we'll discuss the impact of urban green spaces on mental health. Recent studies have shown that access to parks and gardens can significantly reduce stress levels. However, the key factor isn't just the presence of green areas, but their accessibility. For instance, a study in London found that people living within a five-minute walk of a park reported better emotional well-being than those who had to travel further. Interestingly, the size of the green space mattered less than its proximity. So, urban planners should prioritize creating small, local parks rather than large, distant ones.