In today's lecture, we'll discuss the impact of urban green spaces on mental health. A recent study followed 1,000 adults over five years, measuring their exposure to parks and gardens. Surprisingly, the frequency of visits mattered more than the size of the space. People who visited small local parks at least once a week reported a 22% lower risk of depression. In contrast, those who only visited large parks monthly showed no significant benefit. The researchers also noted that activities like walking or gardening in these spaces enhanced the positive effects, while passive viewing from a window had little impact.