The book ‘Clean Technologies and Environmental Protection’ provides comprehensive coverage of the fundamental principles and current practices and trends in the field of green and clean technology, eco-friendly techniques, environmental conservation and environmental protection. This book updates the subject matter, illustrations and problems to incorporate new concepts and issues related to clean technology and environmental protection. The book includes chapters contributed by outstanding scholars and scientists from Egypt, Nigeria & different institutions of India. We hope this book will provide a multi-disciplinary forum to explore emerging areas in the field of green and clean technology, eco-friendly techniques, environmental conservation and environmental protection.