This book highlights the interrelatedness of microbes with life and environment. It stresses that microbes have a beneficial impact on human life and environment. It covers the various aspects of microbes such as molecular biology, interrelationships, microbial intervention in our environment, microbial biotechnology, genetics, immunology, biochemistry, economic importance, interaction with medicinal plants, human beings, industrial relevance, and influence on our health and so on. It will prove to be an excellent reference source for academics, students, scientists and professionals working in applied microbiology, biotechnology and bioengineering.