Ozone Layer :
Envelope around earth is ozone layer. Earth is surrounded by a layer in the stratosphere that contains a high concentration of ozone molecule is known as the ozone layer. This layer protects the earth from the harmful ultraviolet radiation of the sun. This layer due to the presence of ozone molecules shows blueish colour. The ozone layer can absorb 97-99% of ultraviolet radiations from the sun. If this layer was absent or not present around the earth then harmful radiations coming from the sun cause skin diseases and weakened immune system.
Ozone layer depletion :
Scientists have discovered a hole in the ozone layer over the Antarctic. So what is this? This is known as the ozone layer depletion. Know have a look at the ozone layer depletion, its effects, causes, and cures.
“ Ozone layer depletion is the gradual thinning of the ozone layer around the earth. This is due to human activities.”
This happens when chlorine and bromine atoms in the atmosphere come in contact with ozone molecules and destroy them. One chlorine can destroy 100,000 molecules of ozone. Ozone is destroyed more quickly than its form. Some substance contains chlorine and bromine when they come in contact with ultraviolet rays they chlorine present in the release and break the ozone layer. These substances are known as Ozone Depleting substances ( ODS ).
Causes of depletion :
Ozone layer depletion is caused by no of factors. Some main factors are listed below:-
- Chlorofluorocarbon ( CFCs ) is one of the leading causes of ozone layer depletion. This is released by refrigerators, air conditioners, etc. Chlorofluorocarbons when in contact with Ultra violent rays, decomposition of CFCs occur. Decomposition of chlorofluorocarbons releases chlorine that react with ozone and cause degradation of ozone molecule. This is most major damaging factor of ozone layer. CFCs molecule in the stratosphere is broken by UV rays. Then Chlorine release breaks ozone molecules.
- Nitrogenous compounds are also responsible for ozone depletion. Like NO2, NO, and N2O.
- Natural causes ozone is slightly depleted by natural processes like a volcanic eruption.
Effects of depletion :
Due to the ozone depletion, many harmful effects can occur and some of them are listed below,
- Effect on Human Health directly exposure to the ultraviolet radiations may cause some serious health problems as skin diseases, sunburns, and a weekend of the immune system.
- Effect on the environment ultraviolet rays cause minimal growth, flowering, and photosynthesis in plants.
- Effects on the buildings ultraviolet rays cause its impact on stones of buildings and extracting minerals present in them which lead to change in colour.
Ozone depleting substances ( ODS )
Degradation of ozone layer is cause by no of factors and each factor contain substances that chemically decompose the ozone layer. Those substances which causes the ozone layer degradation are known as the Ozone depleting substances.
Some ozone depleting substance with their sources are given below :-
- Chlorofluorocarbons released from refrigerator, dry cleaning agent and AC.
- Halogen released from fire extinguisher.
- Hydro fluorocarbon released fromfire extinguisher and cleaning solvent.
- Methyl chloroform released from Adhesive aerosols.
- Carbon tetrachloride released from solvent and fire extinguisher.
Solutions for Ozone layer depletion :-
Since the International world committee recognized Ozone depletion as a serious issue they are continuously finding solution to ozone depletion. Some suggestions are listed below in order to overcome destruction of ozone layer.
Stop using ODS containing products :-
First of all the products containing ODS should replace. As like Fire extinguisher which release halogen should be replace. Use CFCs free refrigerator and Air Conditioner.
Prefer public transport :-
Vehicles are world wide source of release of greenhouse gases that causes ozone depletion as well as the global warming. So prefer public transportation over personal transport. By doing so we can overcome both global warming and ozone depletion.
Cleaning product should be eco friendly :-
Use of eco friendly cleaning products will help to restrict the release of Cl and Br into atmosphere which cause ozone layer depletion. Cl and Br are major constituents of cleaning products that finds a way toward atmosphere and cause the depletion of ozone layer their.
Nitrous oxide should be banned :-
Use of nitrous oxide should be prohibited because they are second major factor that causes the ozone depletion. Like N2O, NO2 and NO.