That Antarctic ozone hole the world thought it was fixing? There may be a glitch

This is a problem the world thought it had fixed.

Scientists discovered in the 1980s that chlorofluorocarbons — used for refrigeration and in aerosol sprays — were creating a hole in the stratospheric ozone layer far above Antarctica, which could have devastating consequences for life on Earth. (Ozone absorbs much of the sun's cancer-causing and DNA-altering ultraviolet rays, keeping them from reaching the planet's surface.) So the world's nations came together in Montreal and agreed in 1987 to ban specific chemicals that damage atmospheric ozone. In the years since, the ozone hole has been slowly healing.

But now a team of scientists says it has discovered that ozone levels at lower altitudes have decreased — and not over Antarctica, but between the 60-degree latitudes, where the vast majority of the world's population lives. It is only one study, and it's not definitive, but independent climate scientists say the findings are troubling, the potential consequences are dire and more study and analysis are necessary to understand what is happening and how to address it.

Read entire article at: