But a study a year ago found that the ozone layer is unexpectedly declining in the lower stratosphere over the planet's populated tropical and mid-latitude regions.
The team reported that the figures show that the emissions from the area had increased dramatically in the past years, accounting for around 40 to 60 percent of the global increase.
CFCs, formally known as chlorofluorocarbons, were banned after it was found they destroyed the Earth's ozone layer.
This new study says this is mostly being caused by new gas production in eastern provinces of China.
What's more alarming was that the spikes had increased since 2013, indicating that there had been an increase in emission somewhere in the region.
The latest investigation, published on May 22 by researchers from Australia's Commonwealth Scientific and Industrial Research Organisation and Britain's University of Bristol, was able to pinpoint the source of the emissions to northeast China by analysing atmospheric data gathered from South Korea and Japan.
"When the wind is blowing in a straight line from that source to the measuring station, you see a spike", said atmospheric scientist Matt Rigby, lead author of the study from University of Bristol. "Emissions between 2014 and 2017 were around 7,000 tonnes per year higher than during 2008 to 2012". CFC-11 consumption has been banned in developed countries since 1996, and worldwide since 2010. "We didn't find evidence of increasing emissions from Japan, the Korean peninsula or any other country to which our networks are sensitive".
In the 1980's, countries from all corners of the map came together to sign the Montreal Protocol on Substances that Deplete the Ozone Layer, a treaty created to reduce the production of chlorofluorocarbons (CFC) and similar chemicals, typically used in fridges and foams that had the side effect of destroying Earth's ozone layer.
The possibility that CFCs are being released into the atmosphere by the demolition or renovation of old buildings, or new construction using old stockpiles of construction materials that incorporated the chemicals, was also considered and discarded.
It has to be noted that until the 1980s CFCs were widely used in industries and to make a refrigerant and foam insulation.
Tiger enters Memorial as U.S. Open warmup
There's going to be days and weeks where it's just not going to work, and today was one of those days". Even in the immediate aftermath of that disappointment, he had his eye on Pebble Beach and the U.S.
PSG lose to Reims, Monaco stay up in Ligue 1
Paris Saint-Germain defender Marquinhos has admitted to being left puzzled by Kylian Mbappe's recent cryptic comments. This only reinforces my ambition to bring this team to the very top through hard work ".
But a report past year by the London-based Environmental Investigation Agency (EIA) claimed dozens of Chinese companies were still using the banned CFC-11 in the production of polyurethane foam.
The Ministry of Ecology and Environment said late on Thursday it had paid close attention to the unexpected rise in global CFC-11 levels reported previous year.
Suspicions were strengthened when authorities subsequently shut down some of these facilities without explanation.
A chemical banned around the globe for the last 30 years has made an unfortunate resurgence.
This substance is about 5,000 times more powerful as a greenhouse gas than carbon dioxide.
Rising emissions could prevent ozone from returning to normal levels, scientists warn.
"If emissions do not decline, it will delay the recovery of the Antarctic ozone hole, possibly for decades", said Paul Fraser, an honorary fellow the CSIRO Climate Science Centre in Australia.
CFC-11 persists in the atmosphere for about half a century, and still contributes about a quarter of all chlorine - the chemical that triggers the breakdown of ozone - reaching the stratosphere. According to current estimates, the ozone layer is directly responsible for screening out mid-frequency ultraviolet light waves to the tune of 97 to 99 percent.
Today, the "hole in the ozone" over the South Pole is showing clear signs of recovery.
That study identified two possible culprits: industrial chemicals not covered by the Montreal Protocol called "very short-lived substances" (VSLSs), and climate change.
Celle des enfants a été notée 87%, celle des usagers vulnérables de la route 81% et les aides à la sécurité 73%. Le freinage d'urgence automatique, notamment, détecte bien les voitures comme les piétions et les cyclistes.
It was great that we were able to convert the chances we had against Qatar and start our campaign on a brilliant note. Nigeria, runners-up to Portugal in 1989 and Argentina in 2005, raced to a 2-0 lead inside 25 minutes.
The future Hall-of-Famer said that Keith Thurman's boasting isn't new to him since he's been in the sport for over two decades. The unbeaten Floridian has helped kick off the PBC model in primetime on NBC, ESPN and CBS in growing as a favorable TV draw.
The ban applies to goods that have 25 per cent or more of US-originated technology or materials and may affect non-American firms. In its statement, the company said it had "engaged with the USA government regarding all of this since last October".
Annoncé très proche du Real Madrid depuis plusieurs jours, Eden Hazard pourrait finalement être bloqué par Chelsea . Des négociations qui s'avèrent difficiles et compliquées pour les Merengues, bien qu'ils restent confiants.
Pickup customers looking for a Silverado Trail Boss with a mouth to match its pants are now able to quench that thirst for power. The 3.0-liter Duramax engine will be available in the 1500 variants of the Silverado and the Sierra.
Addressing reporters this afternoon, Victoria Police assistant commissioner Luke Cornelius deplored violence against women. The cause of the woman's death is yet to be determined and she has not been formally identified.
At RBC, total loans rose around 9%, while at TD, they rose 3%, with all home, personal and business loans showing growth. The Royal Bank of Canada (RBC) logo is seen outside of a branch in Ottawa, Ontario, Canada, February 14, 2019.
As of this writing , Bond 25 will be released in the United Kingdom on April 3rd 2020 and April 8th 2020 worldwide. It's also probably going to be Craig's last outing as the character, so here's hoping he gets a proper send-off.
Such transitory factors, the minutes noted, had been the main cause of low inflation for "the last couple of years". Dallas Federal Reserve Bank President Robert Kaplan poses at a luncheon in El Paso, Texas, U.S., October 2, 2018.
Je venais juste d'avoir 18 ans. "Le fait qu'il ait utilisé cette histoire pour vendre son livre m'a beaucoup dérangée". But I've been receiving anonymous threats of violence from her fans, and it's affecting my business and my health.
Alabama, USF schedule three-game football series
The Bulls are set to host Louisville, North Carolina State and Western Kentucky, while traveling to Alabama. USF and Alabama have met once previously with the Tide winning, 40-17, in Tuscaloosa on August 30, 2003.
Here's How Many US Cancer Cases Are Tied to Unhealthy Diets
The team found that poor diets may have been behind around 5.2-percent of new invasive cancer cases in adults in 2015. They make up more than 50% of the United Kingdom diet, and more of the developing world is starting to eat this way.
Daniel Franco Sues Jay Z And Roc Nation After Brain Injury
Franco believes that no one took the proper steps to ensure his safety or provided testing to check if he was medically fit. Franco is seeking "unspecified damages" and wants Roc Nation Sports to be held accountable for failing to protect him.
IOC aims at more flexible future Olympic Games elections
The embattled body is also free to organise the boxing events at Continental Games which will be held across the world this year. The IOC will develop a new calendar for the Olympic qualifiers, which will take place between January and May 2020.