This book covers a variety of topics regarding environmental practices in our day-to-day lives, as well as topics concerning sustainable development as a broader concept embracing ecological, social, and economic aspects to improve the quality of life for people around the world. Starting with the traditional controversy between the neoclassical economy and sustainable economy, which may be overcome by scientific progress due to more intensive scientific studies of the sustainability paradigm, the book proceeds to discuss various problems and challenges regarding environmental protection and sustainable development in different countries and on different continents. This includes analyses of recent, sometimes fatal mining disasters in South and North America, challenges and opportunities for rural development in Africa and Australia, an exploration of the role of women for sustainable development in Palestine, water safety and water security issues in Asia and Australia, the environmental exploitation of popular tourism destinations like Acapulco, and deforestation in Malaysia, suggesting innovative approaches to turn challenges into opportunities to effectively tackle these problems. Other topics addressed involve sustainable energy creation for future generations, a research survey among Romanian students on sustainable consumption behavior, validity testing for a heat transfer model in a greenhouse, and a case study on sustainability risk management practices at Malaysia’s environmentally sensitive companies. The book closes with an examination of highly digitalized Smart Cities as a potentially valuable complement to conventional urban and rural lifestyles in connection with achieving the UN Sustainable Development Goals (SDGs).