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In 1985, British researchers reported that the ozone layer over the Antarctic had, for years, decreased rapidly each spring but had returned to normal the following winter. |
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In a report by British researchers that appeared in 1985, it is pointed out that the ozone layer over the Antarctic had, on several occasions, decreased drastically in the spring but returned to normal in the following winter. |
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British research team reported in 1985 that the ozone layer over the Antarctic had, over a period of years, decreased to an alarming extent each spring but had returned to normal the following winter. |
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British researchers in 1985 established the fact that the ozone layer over the Antarctic had thinned out alarmingly each spring for a number of years, but returned to normal each winter. |
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By 1985 British researchers had confirmed the fact that the ozone layer over the Antarctic had decreased suddenly each spring, over several successive years, but returned to normal each winter. |