This book introduces readers to desalination processes and technologies, covering both commercial desalination technologies (MSF, MED, MVC/TVC, RO and EDR), as well as newly developed technologies (MD, HDH, SS) and alternative driving energies, such as solar and nuclear. The author presents the material in the form of questions and answers in order to be accessible to readers with a wide variety of backgrounds. The book includes special sections in RDI with novel ideas particularly in solar desalination (water from Sun).