Status of implementation of the Vienna Convention on protection of the Ozone layer, and the Montreal Protocol on substanmces that deplete the Ozone layer
Prior to the year 1997, under the guidance and coordination of the United Nations Environment Programme (UNEP), a number of interventions and actions were instituted aimed at phasing out the use of substances that deplete the Ozone Layer. Thereafter in 1997, the World Plan of Action on the Ozone Layer was put in place, to focus on cooperation in research on atmospheric conditions, health and environmental effects, and emission of ozone-depleting substances (ODSs). The Coordinating Committee on the Ozone Layer (CCOL) was created and reaffirmed that depletion of the Ozone Layer posed a real threat to the integrity of planet earth.
The Ozone Layer – Ozone is a gas that occurs naturally in the atmosphere, and is mainly found in two regions of the atmosphere. About 10% of total ozone gas is found in the region called troposphere which lies 10 to 16km above the earth’s surface; and 90% of the total ozone gas is found in the region called the stratosphere that lies between 16 and 50km above the earth’s surface. It is the stratosphere that is referred to as the “Ozone Layer” and it surrounds the whole earth. The troposphere lies immediately above the earth’s surface – the air we breathe and prevailing weather conditions
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