This article provides a comprehensive global review of the impact of urban green spaces on environmental health. Urbanization has led to the expansion of cities, and the integration of green spaces into these landscapes is crucial for maintaining sustainability, well-being, and ecological balance. Urban green spaces play a vital role in biodiversity preservation, acting as habitats for diverse plant and animal species, which contribute to the maintenance of urban ecosystems and ecological balance. These spaces also improve air quality by absorbing pollutants and releasing oxygen through photosynthesis, acting as natural air purifiers. Additionally, urban green spaces help regulate temperature by providing shade and reducing surface temperatures, mitigating the urban heat island effect. Beyond environmental benefits, these spaces enhance mental and physical well-being through recreation, exercise, and relaxation, and foster social cohesion and community engagement. The review emphasizes the importance of recognizing the multifaceted benefits of urban green spaces to guide sustainable urban development practices worldwide.This article provides a comprehensive global review of the impact of urban green spaces on environmental health. Urbanization has led to the expansion of cities, and the integration of green spaces into these landscapes is crucial for maintaining sustainability, well-being, and ecological balance. Urban green spaces play a vital role in biodiversity preservation, acting as habitats for diverse plant and animal species, which contribute to the maintenance of urban ecosystems and ecological balance. These spaces also improve air quality by absorbing pollutants and releasing oxygen through photosynthesis, acting as natural air purifiers. Additionally, urban green spaces help regulate temperature by providing shade and reducing surface temperatures, mitigating the urban heat island effect. Beyond environmental benefits, these spaces enhance mental and physical well-being through recreation, exercise, and relaxation, and foster social cohesion and community engagement. The review emphasizes the importance of recognizing the multifaceted benefits of urban green spaces to guide sustainable urban development practices worldwide.