The latest false-color view of total ozone over the Antarctic pole, November 4, 2018.
Last week, the National Oceanic and Atmospheric Administration reported that a hole that forms in the ozone over Antarctica each September was not as large as it would have been 20 years ago.The ozone is a layer above the Earth's surfaces that "acts like sunscreen" to protect the plant from ultraviolet radiation that could lead to skin cancer and cataracts, damage plants, and suppress immune systems, according to NOAA.The hole was still "slightly above average size" this year, the report said. Besides dichloromethane, another highly concentrated chemical identified in the stratosphere includes 1,2-dichloroethane - an ozone-depleting substance used to make PVC, a popular construction material.
At the recovery rates projected by the United Nations report, the northern hemisphere and mid-latitude ozone is scheduled to heal completely by the 2030s, followed by the southern hemisphere in the 2050s and polar regions by 2060. Use of man-made chemicals called chlorofluorocarbons (CFCs), which release chlorine and bromine, began eating away at the ozone.
It shows that the concentration of ozone-depleting substances continues to decrease, leading to an improvement in the layer since the previous assessment carried out in 2014.
This year, the ozone hole over the South Pole peaked at almost 9.6 million square miles (24.8 million square kilometers).
Gemelas recién nacidas fueron lanzadas desde un auto
Se cree que su madre desesperada arrojó a las niñas por la puerta de un auto en la madrugada del martes por la mañana. La provincia Negros Oriental, en Filipinas , está conmocionada por el intento de doble asesinato de las gemelas .
The Kigali Amendment, scheduled to come into force on January 1 to reduce hydrofluorocarbons or pollutant gases, is one of the key issues on debate at the meeting.
If nothing had been done to stop the thinning, the world would have destroyed two-thirds of its ozone layer by 2065, Newman said.
Another problem is that new technology has found an increase in emissions of a banned CFC out of East Asia, the report noted.
The ozone layer is on track to fully fix itself in 50 years, a new Union Nations report says, and that is good news for your health.
In the meeting, which will last until this Friday, the results of the four-yearly report carried out by the Scientific Evaluation Panel of the global agreement were presented, which leaves the experts in a mood of optimism and hope.
The UN report estimates that the world can avoid up to 0.5 degree celsius of global warming this century if it is implemented. Newman said we need to wait until 2060, and let our grandchildren do the celebrating.