The erosion of the ozone layer and the protection from the ozone layer pollutants
The erosion of the ozone layer
The ozone hole is a thinning or losing parts of the ozone layer above the south pole , The scientists have noticed that there was the erosion of the ozone layer above the South Pole , Since 1978 , And it is known as the ozone hole .
It increases in September each year , Because all the pollutants assemble as black clouds , and they are pushed by the wind towards the South Pole to increase the ozone depletion from year to year .
The most dangerous pollutants of the ozone layer
|The most dangerous pollutants of the ozone layer .|
Chlorofluorocarbon compounds which known as Freon , And it is used as a cooling substance in the air conditioning sets , It is used as a Propellant substance in aerosols , It is used as a flating substance in making the foam backing , And It is used as solvent substance for cleaning the electric circuits slides .
Halons which used in the fire extinguishers .
Nitrogen oxides that are produced from the burning of the fuel of the ultrasound airplanes ( Concorde ) .
Methyl bromide gas that is used as an insecticide to preserve the stored agricultural crops .
|The steps of the erosion of the ozone layer .|
How to Protect the ozone layer ?
There was an international conference in Canada , It was held in 1987 to discuss how to protect the ozone layer which is known as Montreal Protocol , and they reached a group of the recommendations , It was signed by 191 nations .
Some of these recommendations is to reduce the using of the chlorofluorocarbon compounds and we must find the safer alternatives , And we must stop producing the ultrasound Concorde planes as their exhausts affect the ozone layer .
Montreal Protocol has been modified in London in 1990 in a way that all the nations must ban production or handling the chlorofluorocarbon compounds .