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Although the ozone hole over Antarctica appears to be shrinking, it is still a problem. |
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If the ozone hole over Antarctica shrunk, it would still be three times bigger than the US. |
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Even if the ozone hole over Antarctica appears to be shrinking, it is still three times the size of the US. |
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The ozone hole over Antarctica and the US seems to have declined three times in size. |
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The ozone hole over the US, which is approximately three times bigger than Antarctica, seems to be declining. |