@cleoabram: What really happened to the ozone layer? Remember when it had a huge hole? Now it’s shrinking! Here's what happened: The ozone layer is high in the atmosphere and shields us from radiation. But in the early 80’s scientists noticed the ozone above the south pole was depleting…. fast. Scientists suspected that chemicals in everyday products were rising into the atmosphere and destroying ozone molecules. So scientist Susan Solomon led an expedition to the south pole and proved that the chemicals, called chlorofluorocarbons, were to blame. Her work became the basis for the UN Montreal Protocol, which banned chlorofluorocarbons in 1987. Since then, emissions have dropped dramatically and the latest data from NASA satellites shows that the ozone layer is recovering! For more optimistic science and tech stories, follow along! #animation #ozone #optimism #Science #Tech