Science Alert: Study traces mysterious spike of ozone-destroying chemical to two provinces in northeast China
The new emissions violate a global treaty and could delay recovery of the ozone layer. The study, published Wednesday in the journal Nature, comes one year after another report revealed that air samples had shown a startling excess of a globally banned chemical since 2012.
The new emissions violate a global treaty and could delay recovery of the ozone layer. The study, published Wednesday in the journal Nature, comes one year after another report revealed that air samples had shown a startling excess of a globally banned chemical since 2012.
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