Part I- Reviews on energy and environment.- Chapter 1. A review on production, properties and applications microbial surfactants as a promising biomolecule for environmental applications (Kidist Mulugeta, M. Kamaraj, Mesfin Tafesse & J. Aravind).- Chapter 2. Hairy Root Applications in Phytoremediation - An updated Review (Anil Kumar Moola, Balasubramanian P, Lakkakula Satish, Sasanala Shamili, Manikandan Ramesh, T. Senthil Kumar & B. D. Ranjitha Kumari).- Chapter 3. Pretreatment of wheat straw using ionic liquids for bioethanol production - A review (Ibsa Neme & Chandra Masi).- Chapter 4. Harnessing the sustainable bioresource, cellulose at the nanoscale for multifarious environmental applications (Ebrahim M. Abda & Rocktotpal Konwarh).- Chapter 5. Allelochemicals as natural herbicides for sustainable agriculture to promote a cleaner environment- A review (Hemalatha Palanivel, Gebiyaw Tilaye, Sathish Kumar Belliathan, Solomon Benor, Solomon Abera & Kamaraj M).- Chapter 6. Strategies and limitations of water treatment methods for point-of-use application (N. R. Srinivasan, M. Kamaraj & S. Venkatesa Prabhu).- Part II - Cleaner technologies on mitigation of organic and inorganic pollutants.- Chapter 7. Recent trends in application of Bacterial polymers to mitigate organic and inorganic pollutants (P Muthukumaran, J Aravind, M Kamaraj & KK Ramachandran).- Chapter 8. Bioremediation: Efficient technology to combat Pesticide pollutants in Environment (Raman Kumar Ravi & R.Y. Hiranmai).- Chapter 9. Removal of dyes from industrial effluents using bioremediation technique (Narayana Saibaba K.V.).- Chapter 10. A harmless approach on textile effluent detoxification: bioremediation and its recent strategies (R. Kavitha, S. Venkatesa Prabhu & Melkamu Kifetew. M).- Chapter 11. Modern Bioremediation Approaches for Clean and Green Environment (AnkitaMurmu, S. Murugan).- Chapter 12. Arsenic-transforming bacteria - A potential weapon for Arsenic contaminated soil (Radhesh Krishnan Subramanian & Prabhakaran Narayanasamy).- Chapter 13. Phycoremediation of heavy metals, factors involved and mechanisms related to functional groups in the algae cell surface- A review (Abate Ayele, Arumuganainar Suresh & Solomon Benor).- Chapter 14. Heavy Metal Extraction from E-Waste through Bioleaching: A Promising Ecofriendly Approach (S. Venkatesa Prabhu, N.R. Srinivasan & Sintayehu Mekuria. H.).- Chapter 15. Potential of Free Floating Macrophytes for Bioremediation of Heavy Metals - A conceptual Review (Punita Parikh & Krupa Unadkat).- Chapter 16. Bioremediation of heavy metals using Salvinia molesta - a freshwater aquatic weed for pollutant remediation approach (Nithya T.G, Snegapriya P & Kamaraj M).- Chapter 17. Mycoremediation: Fungal-based technology for biosorption of heavy metals - A Review (Abate Ayele, Setegn Haile, Digafe Alemu, Tamiru Tesfay & Kamaraj Murugesan).- Part III - Impact and risk assessments.- Chapter 18. Geospatial modelling of air pollution and its impact on the health of urban residents using spatial statistical models - A review (Janani Selvaraj, Harathi Dayalan & Prashanthi Devi M).- Chapter 19. Health impacts of contaminated water in India: Coping Strategies for Sustainable Development (J.V. Arun & A. Premkumar).- Chapter 20. The potential of biotechnology on soil quality by minimizing agrochemical impact to ensure sustainable agriculture - A review (Solomon Abera)