Lingering atmospheric pollutants and frigid air have carved an unusually deep hole in Earth's protective ozone layer over the Arctic, and it threatens to get deeper this spring. (science.sciencemag.org)
Instead of using R - 22 refrigerant, which can damage the earth's protective ozone layer when released, the refrigeration systems used in the manufacturing process employ glycol as refrigerant. (fooddrink-magazine.com)
The ozone hole is a severe depletion of Earth's protective ozone layer which takes place each spring over Antarctica. (giss.nasa.gov)