In new research, NOAA found that global concentrations of the harmful chemicals that damage the ozone layer have declined just over 50% in the mid-latitude stratosphere, to levels observed in 1980.
Though slower, there has also been a decline in concentrations over Antarctica, where a hole in the ozone layer appears every year. NOAA found concentrations have declined 26% since peak values in the region in the '90s. In 2021, that hole was– bigger than the size of Antarctica itself, but now NOAA says that the Antarctic ozone layer is projected to recover"sometime around 2070."
Stephen Montzka, senior scientist for NOAA's Global Monitoring Laboratory, said the progress is great, but"at the same time, it's a bit humbling to realize that science is still a long way from being able to claim that the issue of zone depletion is behind us."
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