In today's lecture, we'll discuss the impact of urban green spaces on mental health. Recent studies show that even small parks in city centers can significantly reduce stress levels. However, the key factor isn't the size of the space but its accessibility. For instance, a study in Melbourne found that residents living within a 10-minute walk of a park reported 20% lower anxiety scores. Interestingly, the presence of water features, like ponds or fountains, had a stronger calming effect than trees alone. So, when designing new neighborhoods, planners should prioritize easy access to these areas over creating large, distant parks.