| 1. | This is why ozone holes first formed, and are deeper, over Antarctica.
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| 2. | Is it because the ozone hole is now the size of Antarctica?
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| 3. | Scientists already knew that the ozone hole had cooled the upper atmosphere.
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| 4. | The Nimbus measurements made clear how severe the ozone hole problem was.
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| 5. | The ozone hole is a thinning of the Earth's protective ozone layer.
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| 6. | Good news : The Antarctic ozone hole didn't get any bigger this year.
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| 7. | Bojkov said massive ozone holes will continue for another 15 to 20 years.
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| 8. | Radiation is pouring through an ozone hole six miles up in the sky.
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| 9. | We all know that there is a ozone hole over Antarctica.
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| 10. | The behavior seen in the Antarctic ozone hole is completely different.
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