This Special Issue collates a selection of cutting-edge research articles and reviews that assess critical aspects of sustainability in diverse domains. The contributions address topics such as environmental preservation, energy efficiency, sustainable urban development, and innovative solutions to mitigating climate change. Each study emphasizes the interconnectedness of economic, social, and environmental dimensions, showcasing interdisciplinary approaches and practical insights to foster sustainable practices. The manuscripts presented in this reprint are crucial for policymakers, researchers, and practitioners seeking to promote sustainable development, reduce environmental impacts, and enhance societal well-being. This compilation serves as a comprehensive reference for advancing sustainability in both theory and practice.