In today's lecture, we'll discuss the impacts of urban green spaces. Recent studies show that parks and community gardens not only improve air quality but also significantly reduce stress levels among residents. For example, a study in Melbourne found that people living within 500 meters of a green space reported 30% lower anxiety. Additionally, these areas encourage social interaction, which strengthens community bonds. However, the lecturer points out that maintenance costs can be high, and funding often depends on local government budgets. Despite this, the long-term health benefits outweigh the expenses, making green spaces a vital investment for sustainable cities.