This volume explores the potential of microorganisms as active agents in reducing greenhouse gas emissions and restoring ecological balance. It provides an overview of microbial strategies for carbon sequestration, methane and nitrous oxide mitigation, and bioremediation. It further explores cutting-edge applications such as microbial fuel cells, bioengineered methanotrophs and synthetic biology for climate resilience. Structured into fifteen chapters, the book covers microbial dynamics in carbon-rich ecosystems, marine microbes in oceanic carbon cycling, plant probiotics for regenerative agriculture, and designer algae for enhanced carbon capture. It further examines AI and nanotechnology integration with microbial systems, offering a forward-looking perspective on climate-smart biotechnology. Additionally, by positioning microbes as bioengineers for climate action, this book highlights their role in advancing circular bioeconomy frameworks and global climate strategies.

Bridging fundamental science, applied research and policy, this volume serves as a practical roadmap for researchers, industry professionals and policymakers. It emphasizes real-world applications and interdisciplinary approaches, making it an essential resource for environmental biotechnology, microbiology, climate science and sustainability studies.

Dr. Ravi Kant Bhatia is presently working as an Assistant Professor in the Department of Biotechnology Himachal Pradesh University, Shimla, India. Dr. Bhatia has vast experience in industry and academia and continuously engaged in teaching and research activities. He has published over 80 research publications. He is working in the area of environmental biotechnology. Beside his teaching and research assignments, he is also looking after Biotechnology Incubation Centre (BIC-HPU) to promote bio-entrepreneurship in the field of biotechnology. He is enlisted among the world's top 2% scientists as per the list issued by Stanford University, USA. 

Dr. Aubrey Dickson Chigwada is a microbiologist and molecular geneticist specializing in environmental biotechnology, genomics, and bioinformatics. He holds a PhD in environmental science from the University of South Africa, focusing on the isolation and genomic characterization of microorganisms for plastic bioremediation. Proficient in advanced tools including Illumina MiSeq, R, Python, SQL, NumPy, and Pandas, he has authored impactful publications on plastic waste degradation, microbial genomics and pathogen characterization. Currently a postdoctoral fellow at UNISA, Dr. Chigwada leads research on plastic bioremediation.    Dr. Abhishek Walia is an Assistant Professor at the Department of Microbiology, College of Basic Sciences at CSK Himachal Pradesh Agricultural University, Himachal Pradesh, India. He has total 9 years of teaching and research experience after obtaining his doctorate degree. Dr. Walia has published over 45 research papers, 8 review articles and 20 book chapters. Dr. Walia is working in the area of agricultural and environmental microbiology and is currently working on the aspect of sustainable technologies having applications in different industries.