The environment consists of four segments.
It is the blanket of gases surrounding the earth.
It is composed of various water bodies on the earth. It includes the oceans, lakes, rivers, etc.
It contains various types of soils and rocks on earth.
It is composed of all living organisms and their interactions with
the environment, viz. atmosphere, lithosphere, and hydrosphere.
The biosphere is Earth’s zone of air, soil, and water that is
capable of supporting life. It is a zone which is reaching about 10 km
into the atmosphere and down to the deepest ocean floor.
Processes in the biosphere include life and death, evolution and
extinction. Within the biosphere the basic unit of analysis or study is
the ecosystem. Thus, the biosphere is the global sum of all ecosystems.
The atmosphere forms a protective shell over the earth. The
troposphere is the lowest layer and is only Illustration of atmosphere
around earth 12 kms thick. It is the only part warm enough for us to
survive in. The stratosphere is 50 km thick and contains a layer of
sulphates which is important for the formation of rain. It also contains
a layer of ozone, which absorbs ultra-violet light’ known to cause