'Someone in East Asia' is destroying the Earth's ozone layer with banned chemicals

Scientists believe that a mysterious area in East Asia is responsible for the recent rise in CFC quality.

According to Business Insider,, is an organic compound containing carbon, chlorine and fluorine. It contributes to ozone depletion in the upper atmosphere, and scientists believe that the cause comes from an unknown source in East Asia. This information comes from a study published in Nature on May 16.

CFC is a substance commonly used in refrigeration equipment before being banned: refrigerators, air conditioners, . They are widely used because they are easily controlled and are a great flame retardant. great

CFC banned substances contribute to ozone depletion in the upper atmosphere.

But in the late 1980s, scientists discovered that CFC is creating a hole in the Earth's ozone frequency, especially in the Antarctic region. On March 2, 1989, 12 European countries pledged to ban all CFC production and then this agreement was called the Montreal Protocol.

As expected, by 2010, CFC production in the world will end. Of course, this will increase CFC prices on the black market, so it is never 100% effective.

CFC emission rates decreased significantly until 2012 (a sudden drop of about 50%).

Nature's study found that CFC-11 emissions began to rise again. From 2014 to 2016, it has increased by 25% compared to the atmospheric average from 2002 to 2012.

Here is the graph:

For comparison, this is the ratio of two other harmful CFCs:

The main author of the study, who works for the US National Oceanic and Atmospheric Administration, said: "We are looking to warn the global community that this is what is happening and it affects the recovery process of ozone layer".

This is the first time the emission of one of the three long-term CFC forms of existence has increased (since the late 1980s).

CFC-11 is the most widely used version in refrigerators and freezers.

"The increase in CFC-11 emissions is not related to production in the past, meaning that it comes from new production activities that are not yet statistics," the study said.

Its research team excluded CFC-11 from the destruction of buildings with old insulation systems (this system uses CFC-11) because of inappropriate data. And there is also no increase in any time of wind patterns and atmospheric conditions because other gas emissions do not increase.

The only answer is simply an increase in use, and because CFC concentrations have increased in the southern hemisphere more than the Northern Hemisphere, "somewhere in East Asia" is the most likely culprit.

The study adds that more work is needed to find out exactly why CFC-11 emissions are increasing and therefore measures to prevent or limit.