United Nations Reveals Ozone Can Heal Itself
- Phys.org
VIVA – Bromine and Chlorine are both blamed for ozone depletion and were banned in 1987 as part of the Montreal Protocol agreement. The deal was signed by every nation in the United Nations (UN).
The ozone is slowly recovering from decades’ worth of bromine and chlorine use that depleted it to the point that there was a gaping hole over Antarctica, a report released by the United Nations revealed on Monday.
The report is the result of a once-every-four-years scientific assessment that has monitored ozone depletion since 1989. It states that at its current pace of healing, the average thickness of the ozone will return to pre-1980 levels around 2040, and the ozone above the Arctic should return to normal in 2045.
However, things will take a little longer in Antarctica, where a gaping hole has been in the ozone for years. Scientists say at the current pace it will take until 2066 for the ozone to completely heal itself.
Ilustrasi lapisan ozon.
- U-Report
The study determined bromine levels are down 14.5% since their peak in 1999 and chlorine levels are down 11.5% since their 1993 peak.
The recovery of the ozone has been hailed as one of the most significant environmental victories in human history. UN Environment Programme Director Inger Anserson told the AP earlier this year that the ozone’s recovery is preventing over 2 million cases of skin cancer annually.
The chemicals banned by the Montreal Protocol agreement were commonly used in refrigerants and aerosols. The near elimination of the chemical elements by the vast majority of the world showcases how the nations of the world can collaborate on environmental issues when there is a will.
The rare act of collaboration gives hope to environmental activists that humankind can tackle climate change before it is too late.
“Ozone action sets a precedent for climate action. Our success in phasing out ozone-eating chemicals shows us what can and must be done, as a matter of urgency to transition away from fossil fuels, reduce greenhouse gases and so limit temperature increase,” World Meteorological Organization Secretary-General Prof. Petteri Taalas said in a statement, as quoted from Sputniknews site.
The report also mentions that a newer generation of chemicals was banned a few years ago because they contribute to climate change. According to the report, that ban should prevent additional warming of 0.5 to 0.9 degrees Fahrenheit.
