Sustainable cities focus on creating urban environments that prioritize environmental, social, and economic sustainability. This includes reducing carbon emissions, promoting renewable energy sources, increasing access to green spaces, improving public transportation, and enhancing community resilience to climate change. Sustainable cities aim to create a high quality of life for residents while minimizing negative impacts on the environment and future generations. Key principles of sustainable cities include smart growth, eco-friendly infrastructure, and community engagement. Research in this area explores innovative strategies for urban planning, transportation, energy, and waste management to build more sustainable and livable cities for all.