Today we're going to discuss the impact of urban green spaces on mental health. A recent study conducted in Melbourne followed 2,000 residents over five years. Interestingly, participants living within 300 meters of a park reported 15% lower stress levels. However, the benefit was only significant for those who visited the space at least once a week. The study also found that the type of vegetation mattered: areas with diverse tree species had a stronger positive effect than simple grass lawns. So, it's not just about having a green area, but its quality and accessibility.
❓ According to the lecture, which factor is essential for the mental health benefit of urban green spaces?
A. A. Living within 500 meters of any green area
B. B. Visiting the green space at least once a week