IMPORTANCE OF ATMOSPHERE
It is the typical structure and composition of Earth's atmosphere which is responsible for
creating conditions suitable for the existence of a healthy biosphere on this planet.
Atmospheres roll in maintenance of the biosphere in a healthy state as follows:
1. Atmosphere regulates the temperature of the earth's crust. The presence of gaseous
capable of long wavelength radiations, is responsible for maintaining the
temperatures under which life activities are possible.
2. The incoming solar radiations are filtered high above its surface. Harmful ultraviolet
radiations in the stratosphere by the vital ozone layer. These rays can severely
damage the terrestrial life.
3. Constant mixing of the contents of atmosphere occurs due to air currents and the
vertical temperature gradient. This prevents accumulation of harmful gases and
vapours at any particular spot. Therefore atmosphere is a quick and effective media
for transfer, transport and dissemination of gaseous wastes.
4. Pollutants in the atmosphere are removed by a more effective mechanism than that
operating on land or in water. As the troposphere derives its heat from earth’s surface,
warm air being lighter rise and cools down adiabatically. Cooling condenses water
vapours. The entire load of pollutants is brought down with snow, dew or rains
which cleans the most atmosphere.
HYDROSPHERE
Water is essential for life on this planet.
It is a natural resource of fundamental importance.
The atomic structure and unique properties of water seem to be especially designed for
the biosphere.
IMPORTANCE OF WATER FOR THE BIOSPEHRE
Without water life on our planet is impossible the importance of water in sustaining a
healthy biosphere on our planet can be as follows.
1. Water is the medium in which all biochemical reactions within a living
organism and a large number of chemical reactions involving components of
rocks, soil and pollutants of environment occur. It is the availability of water
which determines the nature composition and abundance of terrestrial life.
Regions with very low rainfall become deserts. Lush green vegetation
develops where water is in abundance.
2. Due to its high specific heat changes in its temperature need large amounts of
heat energy or its withdrawal as compared to other objects. This causes
temperature differences between land and sea when heated by solar radiations
and an active air circulation is maintained. The air circulation in turn
determines precipitation pattern and climatic conditions of locality.
3. A high latent heat of vaporization causes a large amount of solar energy to be
used up in evaporation of water. The solar heat raised global temperature.
It is the typical structure and composition of Earth's atmosphere which is responsible for
creating conditions suitable for the existence of a healthy biosphere on this planet.
Atmospheres roll in maintenance of the biosphere in a healthy state as follows:
1. Atmosphere regulates the temperature of the earth's crust. The presence of gaseous
capable of long wavelength radiations, is responsible for maintaining the
temperatures under which life activities are possible.
2. The incoming solar radiations are filtered high above its surface. Harmful ultraviolet
radiations in the stratosphere by the vital ozone layer. These rays can severely
damage the terrestrial life.
3. Constant mixing of the contents of atmosphere occurs due to air currents and the
vertical temperature gradient. This prevents accumulation of harmful gases and
vapours at any particular spot. Therefore atmosphere is a quick and effective media
for transfer, transport and dissemination of gaseous wastes.
4. Pollutants in the atmosphere are removed by a more effective mechanism than that
operating on land or in water. As the troposphere derives its heat from earth’s surface,
warm air being lighter rise and cools down adiabatically. Cooling condenses water
vapours. The entire load of pollutants is brought down with snow, dew or rains
which cleans the most atmosphere.
HYDROSPHERE
Water is essential for life on this planet.
It is a natural resource of fundamental importance.
The atomic structure and unique properties of water seem to be especially designed for
the biosphere.
IMPORTANCE OF WATER FOR THE BIOSPEHRE
Without water life on our planet is impossible the importance of water in sustaining a
healthy biosphere on our planet can be as follows.
1. Water is the medium in which all biochemical reactions within a living
organism and a large number of chemical reactions involving components of
rocks, soil and pollutants of environment occur. It is the availability of water
which determines the nature composition and abundance of terrestrial life.
Regions with very low rainfall become deserts. Lush green vegetation
develops where water is in abundance.
2. Due to its high specific heat changes in its temperature need large amounts of
heat energy or its withdrawal as compared to other objects. This causes
temperature differences between land and sea when heated by solar radiations
and an active air circulation is maintained. The air circulation in turn
determines precipitation pattern and climatic conditions of locality.
3. A high latent heat of vaporization causes a large amount of solar energy to be
used up in evaporation of water. The solar heat raised global temperature.
