Paul Crutzen, Mario Molina and Sherwood Rowland were awarded the Nobel Prize in Chemistry in 1995 for helping us understand why the ozone layer, which protects us from harmful UV radiation, was disappearing. On this day, in 1987, nations signed the Montreal Protocol on Substances that Deplete the Ozone Layer in order to fix the problem. Thanks to the laureates work we have managed to reverse this depletion and today the ozone layer is starting to recover. GIF: Ozone depletion occurs in cold temp

84K views · 3.2K reactions | You’ve probably heard of the ozone hole. You may have heard of the Montreal Protocol, which has helped limit destruction of Earth’s ozone layer. But…do you know what the ozone hole actually is? We’ve got Ozone 101 with answers to your questions here ⬇️ | NASA Earth | Facebook