The Ozone Layer is..............

a deep layer in the  stratosphere, encircling  the Earth, that has   large amounts of ozone  in it. The layer shields  the entire Earth from much of the harmful  ultraviolet radiation that comes from the sun. 

The Ozone Hole is.......

an annual thinning of the ozone layer over Antarctica, caused by stratospheric chlorine. Other more moderate thinning's have also been called "ozone holes", such as that over the North Pole during certain weather conditions.The discovery of the annual depletion of ozone above the Antarctic was first announced in a paper by Joe Farman, Brian Gardiner and Jonathan Shanklin which appeared in Nature in May 1985.

Ozone depleting substances

Certain chemicals (such as chlorofluorocarbons, hydro- -chlorofluorocarbons and halons) are recognized as ozone-depleting substances (ODS) because they breakdown in the stratosphere and release chlorine or bromine, which destroy the stratospheric ozone layer. Most ODS are also

  greenhouse gases.

We Need to Conserve Ozone Layer Because......

 

Even minor problems of ozone depletion can have  major effects.  Every time even a small amount of  the ozone layer is lost, more ultraviolet light from the sun can reach the Earth.

Montreal Protocol

The Montreal Protocol on Substances that Deplete the Ozone Layer (a protocol to the Vienna Convention for the Protection of the Ozone Layer) is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances believed to be responsible for ozone depletion. The treaty was opened for signature on 16 September 1987, and entered into force on 1 January 1989, followed by a first meeting in Helsinki, May 1989. Since then, it has undergone seven revisions, in 1990 (London), 1991 (Nairobi), 1992 (Copenhagen), 1993 (Bangkok), 1995 (Vienna), 1997 (Montreal), and 1999 (Beijing). It is believed that if the international agreement is adhered to, the ozone layer is expected to recover by 2050.Due to its widespread adoption and implementation it has been hailed as an example of exceptional international co-operation, with Kofi Annan quoted as saying that "perhaps the single most successful international agreement to date has been the Montreal Protocol". The two ozone treaties have been ratified by 197 states and the European Union making them the most widely ratified treaties in United Nations history.

 

World Ozone Day

Since 1995, on 16 September each year , the International Day  for the Preservation of the Ozone Layer is celebrated. This date has been designated by the United Nations General Assembly in its resolution49/114, to commemorate the signing of theMontreal Protocol on Substances that Deplete theOzone Layer.

Will The Ozone Layer Recover ? Think on it..............

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