The concept of green infrastructure and ecological urban planning has become one of the leading directions in achieving sustainable development, environmental balance, and socio-economic well-being in the 21st century. As rapid urbanization continues across the globe, cities are facing severe environmental challenges such as air and water pollution, inefficient energy consumption, and climate-related risks. In this context, green infrastructure serves as a comprehensive approach to integrate natural systems into urban environments, providing ecological services such as clean air, green transportation, biodiversity protection, and climate adaptation. This article explores international practices in developing sustainable urban environments through green infrastructure, analyzing the experiences of countries such as Singapore, Denmark, Germany, and South Korea that have successfully implemented eco-friendly urban systems. Special attention is paid to the experience of Uzbekistan, where recent national policies have prioritized environmental modernization and ecological balance in urban planning.