The ozone hole over Antarctica got bigger this year, which is unusual. Generally the trend has been for the hole to be shrinking. But NASA is reporting that the ozone hole peaked last week at 10 million square miles. That’s bigger than North America. It’s the third straight year of a moderately large ozone hole. Scientists say the ozone hole is slowly on a shrinking trend as planned. In 1987 countries around the world agreed to ban ozone-munching chemicals in a landmark treaty. Scientists say what’s happening is a blip, likely due to colder weather high in the atmosphere.
Ozone hole grows this year, but still shrinking in general
