The Natural Cycles of the Environment

The biosphere in its widest sense consists of the earth’s crust, the atmosphere and the various species of life that exist in the zone 600 m above and 10,000 m below sea level. The biosphere is very large and complex and, hence, is divided into smaller units called ecosystems. An ecosystem consists of plants, animals and micro-organisms that live in a definite zone along with the physical factors such as soil, water and air.