@abc7la: This year's #ozonehole over the #Antarctic was the largest in a decade, according to a new report by NOAA and NASA. The ozone hole reached its greatest extent for the year on Sept. 18, measuring 10.5 million square miles. The so-called "ozone hole" is not an actual hole in the planet's ozone layer but rather a large region of the Earth's stratosphere with extremely low ozone concentrations.