SUMMARY: The ozone hole above Antarctica is the second largest ever recorded this year, covering 28.2 million square kilometres - down slightly from the record in 2000. The observations were made by NASA's Earth Probe Total Ozone Mapping Spectrometer and the NOAA's Solar Backscatter Ultraviolet instrument, and were confirmed by balloon-carried instruments. Even through chlorofluorocarbons, which destroy the ozone in our atmosphere, were banned in 1995, they're still abundant and it'll probably take another 50 years before the ozone hole disappears completely.

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