Causes of the O3 layer depletion:

1. Ozone molecules are chemically destroyed by special reactions in industries, including chlorine and bromine, in addition to natural reactions in the stratosphere. There is a relationship between natural ozone in the stratosphere and chlorine in industry.

2. When the CFC gas molecules reach the stratosphere, they are exposed to very strong ultraviolet rays. When the ultraviolet rays break down the CFC molecules, chlorine molecules are released into the atmosphere. These chlorine molecules then undergo a catalytic reaction with ozone, in which each chlorine can destroy up to 100,000 ozone molecules before other chemical processes can remove chlorine from the atmosphere.

3. In 1970, chlorine was present at a ratio of 1.2 percent per billion billionths of the atmospheric stratosphere. In 1986, that proportion of chlorine stood at about three-tenths of a billion. If this proportion of CFCs had remained unchanged in 1975 (this possibility was remedied by an international agreement in 1986, known as the Montreal Protocol, as outlined later in the treaty. The share would be about 62 percent, and the chemistry of the stratosphere would reduce the total amount of ozone in the world by five percent.

The total amount of ozone in the world of physics will be reduced by five percent.

4. CFC Gases The two gases CFC 11 and 12 are widely used mainly as a foaming component of plastic foam and as a freezer. These two CFC gases are expected to harm ozone in particular due to their widespread use. 

5. Many halocarbons contribute to global warming as greenhouse gases by attacking and destroying ozone in the atmosphere. There is another chlorofluoro carbon called CFC 113. This gas is used as a clean solution in electronic circuits. The level of this gas storage in the atmosphere is about 11 percent annually.

6. About Carbon Tetrachloride This gas purifier is used to produce liquid CFC gas. The list of suspects also includes methyl chloroform; It is used as a solution and glue. There are Halon 1301 and 121. These are used as fire extinguishing gas. There is also bromine - a chemical element that is related to chlorine. This bromine is released from any fumigant and compound used in the production of fire extinguishers. Bromine is thought to be responsible for 10 to 30 percent of ozone depletion on the Antarctic. . Methane is an ozone-depleting gas caused by the decomposition of underwater, various leaves and various aquatic plants in wetlands. A mound of wood-destroying termites emits 5 liters of methane gas per minute.

7. Ozone has more internal energy than bi-atomic oxygen. But ozone can be broken down by most natural-chemical reactions. For example, the combustion of pathogens and skeletons of various organic animals produces nitrogen oxides. Nitrogen oxides are formed by chemical reactions under the influence of solar energy from excess nitrogen-rich fertilizers used in agriculture and from supersonic jets. This nitrogen oxide variety is natural

9. In addition to man-made chemical factors, other natural causes that are thought to be depleting the ozone layer include solar stains. Scientific sources say that solar eclipses produce more nitrogen radicals that destroy ozone than usual.