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 quality and accessibility. For instance, a well-maintained park with benches and walking paths encourages more frequent visits, leading to greater psychological benefits. Interestingly, the research also suggests that even small green spaces, like street trees or rooftop gardens, can have a positive effect, especially in densely populated neighborhoods. So, urban planners should prioritize not only the quantity but also the design of these spaces.