The Earth’s ozone layer is gradually recovering after international efforts over the past 20 years.
However, by the end of this century, the ozone layer may not return to its stable levels as they were before 1980 due to natural changes and human activities.
According to researchers at the University of Colorado (USA), this recovery of the ozone layer is a result of the 1987 Montreal Protocol, which aimed to ban substances that deplete the ozone layer, such as chlorofluorocarbons (CFCs).
CFCs were widely used in refrigeration and air conditioning until the 1980s when scientists discovered that they could break down the ozone layer that protects the Earth from ultraviolet rays.
To date, more than 180 countries have ratified the Montreal Protocol. This treaty has established legally binding controls for countries regarding the production and consumption of CFCs.
However, scientists warn that the process of ozone layer recovery still faces additional challenges. “In the coming years, ozone levels in the Arctic will still be strongly influenced by stratospheric temperatures, which could slow down the recovery process of the ozone layer.”
TUONG VY
