A strong possibility that CFC-11 which destroys the ozone layer is secretly produced somewhere in the world is found now

ByKen

Absorb ultraviolet light falling from the universe to the earthozone layerPlays an important role in maintaining the Earth's ecosystem. In the 1980s the ozone layer had disappeared in part of the earth and "Ozone hole"Has been found to be caused become a global problem, adversely affect the ozoneFreon(Freon gas), etc. were regulated and used. After that, the concentration of chlorofluorocarbon in the atmosphere has gradually decreased, but it has been found from the latest research that the declining speed of CFC-11, which is regulated, is gentle, and now it is still There is increasing doubt that the production of Freon gas is continuing somewhere on the earth.

An unexpected and persistent increase in global emissions of ozone-depleting CFC-11 | Nature
https://www.nature.com/articles/s41586-018-0106-2

It seems someone is producing a banned ozone-depleting chemical again | Ars Technica
https://arstechnica.com/science/2018/05/it-seems-someone-is-producing-a-banned-ozone-depleting-chemical-again/

For organisms living on the earth, ultraviolet rays are fundamentally harmful. Ultraviolet rays are a kind of electromagnetic waves with high energy. When strong ultraviolet rays hit the living body, skin tissue is damaged, symptoms such as hyperemia and inflammation occur, and even genes may be damaged. The ozone layer exists mainly around the altitude of about 25 km that protected the environment of the earth from such ultraviolet rays. Ozone layer, that of oxygen consisting of three oxygen molecules allotrope "ozone" is a region in which there are many in the atmosphere, the earth thanks to the ozone layer is protected from strong ultraviolet rays, billions of years and biological Has continued to live and has continued evolution.

However, in some of the chemicals produced by humans since the Industrial Revolution, it was present those with action to decompose the ozone. Among them, the most widely produced, had been used is in the or refrigerant, such as air conditioners and refrigerators, was Freon gas which has been used as a pressure gas in spray cans. In the past, Freon gas which had finished its function was released as it was to the atmosphere, gradually reached the ozone layer above the ozone layer and decomposed the ozone molecule, resulting in the formation of a large ozone hole over the South Pole.

ByNASA Goddard Space Flight Center

This was regarded as a problem, and in 1987 "Montreal Protocol on Substances that Destroy the Ozone Layer(Montreal Protocol) "was enacted to regulate the production and use of substances that destroy the ozone layer. Since then, in the world progressive elimination of chlorofluorocarbons and other substances progressing in stages is progressing, and it is stipulated that by 2020 all substances including substitute CFCs are to be abolished. After the end of production and use, the concentration of chlorofluorocarbon present in the atmosphere has gradually decreased, but it is confirmed that the pace of decrease is declining sharply around around 2010 as a guide.

This research was conducted by a research team headed by Mr. Stephen Montzka of the American Oceanic and Atmospheric Administration. The following graph shows the proportion of the existence of CFC-11 molecules in the atmosphere in one trillion fraction. From 1995 to 2005, the ozone concentration in the northern hemisphere (red) and ozone in the southern hemisphere You can see that the density (blue) was decreasing along the predicted line (gray). However, since then, especially since 2005, the graph of ozone concentration began to diverge from the forecast line, and the pace of decline has been noticeably reduced around 2015.


Several causes such as the climate of the earth are considered for this decrease, but as a result of conducting detailed surveys and environmental modeling etc., the reason why the pace of decline is declining is that only the initial pace of decrease is lowered The fact that CFC-11 is being produced somewhere on the earth is increasing. According to calculations based on the trend so far, the answer that explains the current situation is that "CFC - 11 of 6500 tons to 13,000 tons is released into the atmosphere every year".

The report says, "This result shows for the first time that the emissions of one of the three largest and long-lasting CFCs has been sustained since the production regulation was implemented in the late 1980s "There is concern that the future recovery of the ozone layer will be affected. Although it is said that the specific country name etc. are not shown, it seems that there are only a few countries where allegations are suspected due to inadequate production monitoring of Freon gas.