Realizing that a change is needed, actually implementing a series of measures to trigger an improvement & seeing the improvement for our planet Earth is remarkable.
Visually being able to track the improvement and see the changes seems to help advocate the urgency and track the changes to improvements being made!
This brief video captures the the hole in the Ozone layer that was seen and how efforts taken to improve it have helped trigger an improvement across years.
On October 7, 2021, scientists recorded a total-column Ozone concentration of 102 Dobson units, the 8th-lowest level since 1986. Before the emergence of the Ozone hole in the 1970s, the average Ozone above the South Pole in September and October ranged from 250 to 350 Dobson units.
While the 2021 Antarctic Ozone hole is larger than average, it is substantially smaller than those in the late 1990s and early 2000s.
What triggered this improvement?
The Ozone hole is recovering due to the Montreal Protocol and subsequent amendments banning the release of harmful Ozone-depleting chemicals called chlorofluorocarbons, or CFCs. Scientists estimated that if atmospheric chlorine levels from CFCs were as high today as they were in the early 2000s, this year’s ozone hole would have been larger by about four million square kilometers (1.5 million square miles) under the same weather conditions.
This was one of the global changes that required United Nations, politicians, policies, countries & industries accepting to implement them, countries & industries creating alternative processes that are safer for the environment, people, skillset, technology & imaging software, measurements, scientists and statisticians amongst other industries and skills to come together to make a difference.