Since 2010, the production of CFCs is prohibited, which destroys the ozone layer, but there are exceptions
Since the 1970s, it has been found that the release of fluorochlorocarbons (CFCs) is responsible for destroying the ozone layer in the atmosphere. It took some time until the use of CFCs reduced and finally banned after the Montreal Protocol since 2000 and has been prohibited since 2010. Thus, the World Society responds once to prevent its self-destruction. If the ozone layer is destroyed, hard UV radiation can be reached on the earth’s surface and the DNA of plants, animals and, of course, people harmful.
British Science of the University of East Anglia Under the direction of Johannes Laube, four new people made by people discovered in the atmosphere, which in turn devotes the life-protecting ozone layer. As you report in Nature Geoscience, 74.000 tonnes of three new CFCs and a new H-CFCC accumulated. So far, seven CFCs and six H-CFCs were known, which attack the ozone layer. Compared to emissions in the 1980s, which amounted to a million tonnes, the amount is relatively low.
The scientists have up-to-date air samples with those from the Polarschnee in Gronland, which would be compared to a hundred years, and air samples from Tasmania between 1978 and 2012. After the quantities, the four new gases have only passed into the atmosphere, two since 1970s, two piles currently becoming significant, especially the CFC-113A. For all known CFCs no such increases were observed in the 1990s, since introduction of restrictions. Arbor believes that it could be more undiscovered CFCs. Because the newly discovered CFCs in the 1960s are not yet established on the basis of samples can, they were allowed to be made by the scientists of people, so come from industrial production.
"The identification of these four new gas is very disturbing, because they contribute to the destruction of the ozone layer", so Laube. "We do not know where these gases are produced which must be examined." Laube suspected for of chemicals for the manufacture of insecticides or Kuhlmitteln for fridges or from solutions could come to clean computer components. In the Montreal Protocol, according to the scientists, there are loopholes, for example, for compounds such as CFC-113a, which arise in the context of the production of insecticidal cyphalotrine and Tefluthin.
Disturbing should also be that the three new CFCs decompose very slowly in the atmosphere, which is why they are still available for decades at an immediate end of the emissions. The CFC-113A has a life between 27 and 264 years, the H-CFC-133A between 21 and 92 years. The emission of the two gases rises or, during which the CFC-112 and CFC-112a after an increase by 2005 is continuously influenced. In any case, it will not be concluded whether the four CFCs are created in the context of legal manufacturing process or be produced illegally.