Definition of the layer of ozone
Referred to as ozone layer to that portion of the atmosphere located between the 15 Km and 40 Km altitude and that contains a high concentration of ozone. It was discovered at the beginning of century, situation that gave rise to the study of their properties. Ozone is a gas composed of three atoms of oxygen that it can only exist in certain specific circumstances where both temperature and pressure are adequate.
The ozone layer works as a barrier to harmful radiation and at the same time allows to pass the ultraviolet light, thus protecting the development of life.
A problem that is originated in the course of the 20th century is the alteration of the coat in some regions, a situation that alarmed scientists. The problem of the weakening of the ozone is known as ozone hole, and affects mainly the area corresponding to the Antarctic and then the area corresponding to the Arctic. The causes of this problem were unclear for a while but then the tests were to accumulate to designate the phenomenon responsible for the actions of chlorofluorocarbons and fungicides.
To try to control this negative process Governments took a series of measures to eliminate CFCs, United States, Canada, Sweden and Norway to be the pioneers in these provisions. In 1985 signed the Vienna Convention, involving 20 countries that are preparing to negotiate regulations for chemical accused problem. But, without a doubt, the steps more meaningful to protect the ozone layer are: the signing of the Montreal Protocol in 1987, where he remembered reducing for 1999 in CFCs by 50 per cent; a new agreement made in London that rectified the provision and established that it ended with the production of these by the year 2000; and finally, a last correction made in Copenhagen in 1992 advanced the removal for 1996.
Despite the measures taken to alleviate the evils acts, it is true that a significant recovery will take many years to realized. The important thing is that the world's leaders became aware of the situation and got ready to solve it.
The ozone layer works as a barrier to harmful radiation and at the same time allows to pass the ultraviolet light, thus protecting the development of life.
A problem that is originated in the course of the 20th century is the alteration of the coat in some regions, a situation that alarmed scientists. The problem of the weakening of the ozone is known as ozone hole, and affects mainly the area corresponding to the Antarctic and then the area corresponding to the Arctic. The causes of this problem were unclear for a while but then the tests were to accumulate to designate the phenomenon responsible for the actions of chlorofluorocarbons and fungicides.
To try to control this negative process Governments took a series of measures to eliminate CFCs, United States, Canada, Sweden and Norway to be the pioneers in these provisions. In 1985 signed the Vienna Convention, involving 20 countries that are preparing to negotiate regulations for chemical accused problem. But, without a doubt, the steps more meaningful to protect the ozone layer are: the signing of the Montreal Protocol in 1987, where he remembered reducing for 1999 in CFCs by 50 per cent; a new agreement made in London that rectified the provision and established that it ended with the production of these by the year 2000; and finally, a last correction made in Copenhagen in 1992 advanced the removal for 1996.
Despite the measures taken to alleviate the evils acts, it is true that a significant recovery will take many years to realized. The important thing is that the world's leaders became aware of the situation and got ready to solve it.