This year’s ozone hole could be the smallest it has been in 30 years
SEPTEMBER 17, 2019
For decades, scientists have closely observed the ozone layer , which protects Earth from the sun’s harmful ultraviolet (UV) radiation. This year, just in time for World Ozone Day, the European Union’s Copernicus Atmosphere Monitoring Service (CAMS) announced the state of the ozone hole — its size is the smallest it has been in the past 30 years. Free radical oxygen atoms, being charged particles, readily react with other oxygen molecules to form ozone (O3).