One of the main problems confronting the world of the 21st Century is a shortage of water. There is already severe scarcity in many regions of the world, causing tremendous problems for local populations and indeed entire societies. There is insufficient water available for the production of food to alleviate poverty and starvation; the lack of water hampers industrial, urban and tourism development, forcing restrictions on other sectors, especially agriculture; health problems arise as the deterioration of ground and surface waters favours water-borne diseases, which flourish in the absence of decent water distribution and sewerage systems. Water conflicts still arise in areas under stress, while water for nature has become a vanishing priority in such zones. This book is a guide to the establishment of regional and/or local guidelines for developing and implementing new ideas for coping with water scarcity. The basic premise underlying the book is that water scarcity will persist, so personal, human and society-wide skills will be needed to cope with it while living in harmony with the necessary environmental constraints. The book provides basic information to assist decision makers, water managers, engineers, agronomists, social scientists and other professions (and their students) in formulating coherent, hopefully harmonious and consolidated views on the issue. Guidelines are also given for introducing the general public to the concept of water scarcity and how to deal with it.

This book, the conference proceeding, contains invited articles and contributory papers from the 9th International Conference on Energy Engineering and Environmental Engineering, organized by Beijing Jiao Tong University in Sanya, China, on December 9–10, 2022. It includes contributions from researchers and practitioners working in the area of energy engineering, hydrogen, hydrogen carriers technology environmental engineering, climate change & global warming, and related fields. The articles cover the topics such as new energy production, storage, transmission, electrolysis, electrolyzes chemical, thermochemical, electrochemical hydrogen, energy environmental protection, and environmental sustainability. The content caters to research scholars, students, industry professionals, companies, government bodies, and policymakers, who work in the field of energy and environmental engineering.