Environmental Foundations: Ecosystems and Human Impact
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Defining the Environment
The word environment is derived from the French word meaning 'to surround'. Thus, it refers to the sum total of conditions that surround humans at a given point in space and time. It is a composite term for the conditions in which organisms live. In other words, the environment is the totality of all physical, social, and biological factors that comprise the natural and man-made surroundings.
Types of Environment
Considering its basic structure, the environment may be divided into two broad types:
- Physical Environment: This can be further subdivided into three basic realms of the Earth:
- The lithosphere (solid)
- The hydrosphere (liquid)
- The atmosphere (gas)
- Biotic Environment: This component consists of plants and animals, including