Environanotechnology in the nanoscale technology developed for monitoring the quality of the environment, treating water and wastewater, as well as controlling air pollutants. This book provides technological information for environmental scientists and helps them in creating cost-effective nanotechnologies to solve the environmental problems. The aim of this book is to report on the results recently achieved in different countries. It provides useful technological information for environmental scientists and will assist them in creating cost-effective nanotechnologies to solve critical environmental problems, including those associated with energy production.