Since the discovery of a sudden surge in ozone-depleting emissions, scientists have tried to find their source. It looks like the mystery has been solved - today an environmental group stated that it has evidence of China's involvement. The Environmental Investigation Agency said 18 factories in ten provinces in China, which were tested, were found guilty of using banned chlorocarbons.
We thought the ozone hole was shrinking
It used to be, but now it is again threatening growth, and the culprits are air conditioners, refrigerators, and, in particular, the thermal insulation of buildings. They use chlorinated carbon (freons), which were banned in developed countries in the 1990s, and in developing countries (such as China) in 2010, as they are involved in ozone depletion.
What actually happened?
Freons are extremely effective and it is no surprise that they were returned - in violation of the ban. They are especially effective in the use of polyurethane foam used in thermal insulation of buildings.
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Why are chlorocarbons a problem?
Also used in packaging, thinners, and as aerosol propellants, chlorinated carbons, when exposed to ultraviolet light, release chlorine or bromine, which deplete ozone.
When was the ozone hole first discovered?
Scientists discovered the ozone hole in 1985, registering a 30% drop in ozone over Antarctica. By 1992, the hole was about the size of North America.
Why is the ozone layer so important?
It absorbs ultraviolet radiation, preventing most of it from reaching the earth's surface. Thus, ozone protects people from excess UV radiation, which can cause skin cancer and damage the eyes. Ozone also helps protect other life forms such as crops and marine animals.
What can be done to solve the problem?
Perhaps world leaders will be able to convince China to establish the production of freons. If this does not work out, trade sanctions against China are possible, although this is a rather radical tool, applicable last.