-
8/4/2019 23654925 Ozone Depletion
1/15
OZONE DEPLETION..
-
8/4/2019 23654925 Ozone Depletion
2/15
O3-The Earth Protector !!!!
Ozone layer is present around the earth on top of
thestratosphere ,about 30 miles above the earth .
Stratosphere has 90% of Ozone gas.
Bluish Ozone layer absorbs harm full UV rays ( Ultra-Violet)
sentdown by sun along with the light rays.
UV rays has catastrophic effects on plant and animal life , if
itreaches on earth planet.
-
8/4/2019 23654925 Ozone Depletion
3/15
Stratosphere----
-
8/4/2019 23654925 Ozone Depletion
4/15
Blue O3- Ozone protective Layer
ring around the earth ------
-
8/4/2019 23654925 Ozone Depletion
5/15
The Ozone layer---
-
8/4/2019 23654925 Ozone Depletion
6/15
Ozone depletion
- A cause of concern.
Process of Ozone depletion in the form of a hole in the
Ozonelayer , was discovered first in 1984 over Antarctica.
Antarctica ice cap was the first victim of Ozone layer
destruction.
Main culprit causing the damage to Ozone layer is CFC .
-
8/4/2019 23654925 Ozone Depletion
7/15
What is CFC ?
CFC is Chloro-Fluro-Carbon in the gas form.
CFC gas is amazingly useful in many products like
Refrigerator, home insulations , plastics , foams and throw
awayfood containers.
Thomas Midgley , American chemist discovered this gas
in1930.
After extensive use of CFC gas for many years , we realized
thedisastrous effects on plant and animal life.
-
8/4/2019 23654925 Ozone Depletion
8/15
CFC depletes Ozone layer !
How ?
Chlorine in Chloro-Fluro-Carban CFC , is replaced by anOxygen
atom from OzoneO3 forming protective Ozone layer.
This replacement of one atom of chlorine happens by depleting
/destroying approx, 1,00,000 atoms of Ozone from the layer.
1% Ozone layer depletion results into 2% more UV rays
reaching the surface of earth.
-
8/4/2019 23654925 Ozone Depletion
9/15
Ozone Monitoring Instrument..
-
8/4/2019 23654925 Ozone Depletion
10/15
Ozone layer depletion ---More UV rays reaching earth.
Result !!!!.
Catastrophe ???????
Over exposure to UV rays increase the incidences of
a) Skin cancer.
b) Cataract.c) Infective deceases.
And will also affect adversely
a) Life cycle of plants.b) Life in the ocean.c) wind pattern and
thereby climate
through out the globe .
-
8/4/2019 23654925 Ozone Depletion
11/15
Need to control O3layer depletion
World realized the urgent need to control Ozone depletion .
Number of treaties, and laws are written ex. Vienna convention
,Montral treaty .
30 countries including India have agreed and signed
thetreaties.
-
8/4/2019 23654925 Ozone Depletion
12/15
India will phase out the usage of CFC completely by 2030.
Other countries also either reduced or stop the usage of
CFC.
USA and Europe together produce and use 75% of CFC of
the world utilization.
Need to control O3layer depletion--
-
8/4/2019 23654925 Ozone Depletion
13/15
Too little , too late -----
Scientists have stated that the action suggested and taken asper
the treaty are too little , too late.
If we stop usage of CFC today, damage to Ozone layer
willcontinue for next 100 yrs.
Worlds scientific communality is still finding the early
solution to
the issue. So far they are inconclusive.
-
8/4/2019 23654925 Ozone Depletion
14/15
Conclusion----
We all residents of Global village need to think and act
together crossing the boundaries of cast ,religion and even
nation in the interest of this beautiful planet Earth and
for
generations ahead of us , and protect this planet by stoppingthe
abuse of knowledge under the name Development or
Progress.
So, Let us hope that we will have solution to stop depletion
of
Ozone, at the earliest.
-
8/4/2019 23654925 Ozone Depletion
15/15
Thank You ..
