The rapid transformation of the world through urbanization has been a defining feature of the last century. This shift has elevated cities into economic powerhouses that foster innovation, economic development, and social interactions. However, this has come at a cost: often prioritizing immediate economic gains, the fast and unplanned expansion of cities around the world has created a variety of challenges that have a negative impact on both people and the environment, significantly contributing to the intensification of the global climate and biodiversity crises. This publication showcases examples of SGP projects that have successfully managed to address key urban environmental issues across multiple focal areas, including sustainable transport, urban waste and chemical management, urban green space management, biodiversity conservation, land use planning, climate action, education and advocacy.