Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Manchester found that community gardens not only improve air quality but also reduce stress levels among residents. However, the researchers noted a key limitation: the benefits were most significant in neighborhoods with existing social cohesion. In areas lacking community engagement, the gardens had minimal impact on mental well-being. The study suggests that future urban planning should prioritize creating spaces that encourage interaction, rather than simply planting more trees. Professor Davis, who led the research, emphasized that maintenance is another critical factor, as neglected gardens can actually increase local crime rates.