| 21. | They say that the ozone hole may be the cause of the stronger winds.
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| 22. | Scientists predict it will take about 50 years for the ozone hole to close.
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| 23. | The so-called " ozone hole " has been born again.
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| 24. | "The situation hasn't really changed since the ozone hole reached its worst in 1993.
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| 25. | Researchers at the South Pole are studying climate changes, astronomy and ozone hole depletion.
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| 26. | Some scientists were surprised when an ozone hole over the South Pole was documented.
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| 27. | It is important in the formation of the ozone hole.
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| 28. | These conditions have led to ozone hole formation in Antarctica.
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| 29. | True, the ozone hole and runaway inflation are two quite different sorts of peril.
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| 30. | That is two-thirds of the size of the ozone hole.
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