NASA has just reported that the ozone hole over Antarctica is the smallest it’s been in 20 years.
On September 22 2012, the ozone hole reached its maximum seasonal size for the year of 21.2 million square kilometres, which is the same size as the USA, Canada and Mexico combined. This size is down from the maximum size of 29.9 million square kilometres reached in September 2006.
There isn’t much talk about the ozone hole these days but it was often in the news in the 1980s, just as “climate change” is in the news now.
Ozone in the atmosphere helps to protect the Earth from ultraviolet (UV) radiation. As we all know, increased exposure to UV causes skin cancer. In the 1980s when the ozone hole first appeared, the fear of an expanding hole in our protective shield was not good news for Australia, given our proximity to Antarctica.