In today's lecture, we'll discuss the impact of urban green spaces. Recent studies show that parks and community gardens not only improve air quality but also significantly reduce stress levels among city dwellers. Interestingly, the research found that the size of the green space matters less than its accessibility. A small garden within a five-minute walk has a greater positive effect than a large park that requires a bus trip. Furthermore, green spaces with water features, like ponds or fountains, tend to attract more visitors and promote longer stays. This has led city planners to prioritize smaller, well-distributed green areas over a few large ones.