Today in our environmental science lecture, we'll discuss urban green spaces. Recent studies show that city parks not only improve air quality but also reduce stress. Interestingly, a 2023 survey in London found that residents living within 500 meters of a park reported 20% lower anxiety levels. However, the key factor isn't park size but accessibility. Small pocket parks, if well-distributed, can be more effective than one large central park. This challenges the traditional planning approach that focuses on large recreational areas. So, for future urban design, we should prioritize creating a network of small green spaces across neighborhoods.