1. International Day for the
Preservation of the Ozone Layer,
16 September
'32 years and Healing'
2. Ozone (O3) is a molecule made up of three atoms of oxygen (O),
and very reactive gas.
Bluish gas that harmful to breathe.
Is mostly found in the stratosphere, where it protects us from the
Sun’s harmful ultraviolet (UV) radiation.
ozone is essential for life on Earth.
Without ozone, the Sun’s intense UV radiation would sterilize the
Earth’s surface.
3. Location of ozone layer
• Stratosphere: The stratosphere is a layer of Earth's atmosphere that is stratified
in temperature, with warmer layers higher up and cooler layers farther down.
• Ozone Layer: The layer with the highest concentration of ozone molecules, is
found in the stratosphere. The ozone layer filters much out of the sun's
ultraviolet radiation that would be harmful to most forms of life.
• Troposphere: The troposphere is the lowermost portion of the Earth's
atmosphere and the one in which most weather and the "greenhouse" effect
occurs.
4. The Ozone Layer acts as a shield for us from very
harmful UV rays. If we damage the Ozone Layer we
would put ourselves in a big risk. Without the Ozone
Layer we wouldn't be able to survive.
Exposure to UV rays causes skin cancer, damages crops,
harms ocean life and polar shifting. Without the Ozone
Layer the risk of these things would greatly increase.
5.
6. When chlorofluorocarbons (CFCs) and Hydro chloro fluoro carbons
(HCFCs) reach the stratosphere, the ultraviolet radiation from the
sun causes them to break apart and release chlorine atoms which
react with ozone, starting chemical cycles of ozone destruction that
deplete the ozone layer.
One chlorine atom can break apart more than 100,000 ozone
Molecules.
7. The ozone hole is a region of
exceptionally depleted ozone in the
stratosphere over the Antarctic that
happens at the beginning of Southern
Hemisphere spring.
8.
9.
10. •Products in spray destroys the Ozone Layer, because this
uses chlorofluorocarbons that are chemicals that lasts 100
years in ozone layer and destroys it.
•Also there is CFC; it is highly used as a coolant in
refrigerators and air conditioners. This reacts with an
ozone molecule, taking an oxygen atom with it and
leaving a normal oxygen molecule.
16. ⚫On December 19,1994, the United Nations General
Assembly, proclaimed September 16 to be the International
day for the preservation of the ozone layer,
commemorating the date when Montreal protocol was
signed.
⚫The World Ozone Day was first celebrated on September
16, 1995.
17. ◾ On this day, a number of special events such as talks
and seminars are held in Canadian city of Montreal
and allmost all countries regarding ozone.
◾ This day is mainly intended to spread awareness of
the depletion of the ozone layer and search for the
solution to preserve it.
