31 octubre 2014
The Antarctic ozone hole reached its annual peak size on Sept. 11, according to scientists. The size of this year’s hole was 24.1 million square kilometers (9.3 million square miles) — an area roughly the size of North America.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/aXifnwzu1Ys/141030213801.htm
