The book has 2 sections; Section A focuses on Environmental Sustainability and Green Technology and Section B covers Emerging Technologies in Environmental Biotechnology. The book introducesEnvironmental biotechnology as a tool to progress towards sustainable development goals and covers green technologies such as Bio-plastics, Third generation hybrid technology for algal biomass production, wastewater treatment and greenhouse gas mitigation, Green vaccination, Bio-fuels, Microbial enzymes, Bioelectrical systems, eco-friendly handmade paper production, nature based sanitation solutions, and greener ways to tackle air pollution along with the application of GIS to monitor & manage COVDI19 pandemic. The Section B covers emerging & innovative technologies such as vermifiltration, Small scale PVA gel based innovative solution for wastewater treatment, Cyclic technology based sequencing batch reactors (SBR) and role of Role of Bio-selectors in Performing Simultaneous Nitrification and Denitrification in SBR’s. It holistically covers essential information on Enzymatic Biotransformation and Biopolymer based nanocomposites for dye waste treatment, Arbuscular Mycorrhizal Fungi assisted Bioremediation of heavy metals, Coir Retting and Duckweeds: The Tiny Creatures for Resolving the Major Environmental Issues. It is a promising book for researchers, academicians, teachers, students, industrial enterprises, policy makers, public health officials and general users. The book is closely aligned to curricula of post graduate courses in biotechnology, microbiology, environmental biotechnology and environmental science.