How the World Saved the Ozone Layer — and Why We Haven’t Repeated It Countercurrents The Ozone Hole’s Earliest Cause Wasn’t CFCs After All Gizmodo Ozone depletion began decades before discovery of ozone hole, scientists find Phys.org Scientists say ozone loss could have been spotted in the 1950s, because today’s layered satellite tools re The Economic Times Scientists Reveal Early Signs of Ozone Depletion as Far Back as 1957 The Times of India