Environmental awareness in recycling and limiting toxic emissions are, indeed, important. However, although not generally known, this book introduces a chemical approach to the problem of environmental pollution in which the aim of the work carried out is to recover and protect our environment, the most important challenge facing mankind in this 21st Century. Various studies on the utilisation of clean and abundant solar energy, chemistry use by solar irradiation and highly efficient new battery systems, etc., are presented for a book into technologies and systems for the global environment. This book would be very useful and instructive for students in chemistry and materials science as well as chemical engineers in industry.