This book highlights the latest advancements in microbial biotechnology and its crucial role in promoting sustainable development across three key areas: bioenergy, bioremediation, and bioproducts.It emphasizes the potential of microbes as renewable, sustainable resources capable of generating high-value products and acting as efficient alternatives to conventional methods. Key topics included algal, bacterial, and fungal biotechnology, focusing on producing biomass and valuable metabolites through CO2 sequestration, concurrent bioremediation, resource recovery, and environmental sustainability. This book presents cutting-edge information on how integrated microbial engineering can valorize waste while sustainably generating essential resources. Additionally, it explores how microbes can help address critical challenges, such as resource depletion and pollution management, offering solutions for a more sustainable future.