Arctic ozone levels in never-before-seen plunge - BBC News - discu.eu

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Arctic ozone falls to record low level http://www.bbc.co.uk/news/science-environment-12969167 3 comments 5/4/2011 science

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Arctic ozone loss at record level - BBC News http://www.bbc.co.uk/news/science-environment-15105747 50 comments

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