This book comprises select proceedings of the International Conference on Energy and Environment - Global Challenges (ICEE 2018). The book focuses on applications of green technologies in chemical and biochemical engineering, wastewater treatment, energy and environmental sustainability. It covers current environmental issues such as air pollution and control, solid waste management and wastewater treatment, and suggests potential solutions to tackle them. The contents of this book will be useful to students and researchers working in the field of energy and environmental engineering.