This book was made possible by the exceptional support provided by NATO Sci entific and Environmental Division, University of Maribor (Slovenia), Govern ment of the Republic of Slovenia, British and the United States Embassies (Ljubl jana, the Republic of Slovenia). The authors, as listed in this book, took the time to prepare excellent manu scripts focusing on various issues related to technological choices for sustainabil ity. These manuscripts were rigorously reviewed and refereed by scientists and engineers before inclusion in this book. An introductory chapter was prepared to provide an...