Ozone layer shows first signs of thickening, after many years of decreasing dilution, according to a new UN report.
The ozone hole over Antarctica has also stopped growing. But it will take a decade before it begins to shrink.
The main cause of ozone depletion is believed to be anthropogenic emissions of so-called CFCs. These emissions were sharply limited by the conclusion of an international agreement in Montreal in 1987, called the Montreal Protocol.
Earth’s sunglasses lost strength
Through the 1990s and 2000s there were regular reports of record low measurements of the ozone layer. The reason for the development was linked to emissions of various chlorine compounds, CFCs.
The ozone layer is popularly called the earth’s sunglasses. As it became thinner it increased the sun’s harmful UVB rays, ultraviolet rays, which can be dramatically for both plants, animals and humans.
In many places, particularly the far south of the southern hemisphere, increased when the incidence of skin cancer and eye damage as a result of stronger radiation when the ozone layer was thinner.
In 1987 the Montreal Protocol was adopted by 24 countries. Subsequently, 175 second joined and pledged to phase out the use of CFCs.
And they have complied with the agreement. When it was signed, it was produced 1.8 million tonnes of ozone-depleting gas into the atmosphere each year. In 2010, it produced 45,000 tons. There is a reduction of almost 98 percent.
As a result, the ozone layer shows first signs of thickening.
This shows that human action can make a positive impact on the environment. Let’s hope this can inspire the global community to tackle climate change and reduce global CO2 emissions.