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 study in Melbourne found that residents living within 300 meters of a well-maintained park reported lower anxiety compared to those with only small, poorly kept plots. Interestingly, the effect was stronger for older adults. So, while quantity matters, design and maintenance play a crucial role in maximizing benefits.