The environment encompasses various elements crucial for life on Earth. Understanding its 

components is essential for grasping ecological systems, sustainability, and human impact on the 

planet. In this lecture, we will delve into the nature of three fundamental components of the 

environment: the atmosphere, soil, and water. 

Environmental Microbiology is the study of microorganisms and the physical and chemical conditions 

influencing them. Environments are components of ecosystems.