in Science for Environment Policy > Issue 266 (16 December 2011) . - 1 p.
For the first time, scientists have identified an 'ozone hole' over the Arctic, in addition to the well-known ozone hole over the Antarctic. Unusually persistent low temperatures over the Arctic in early 2011 caused an unprecedented amount of chemical destruction of stratospheric ozone there. The authors warn that this is likely to happen again, although it is presently difficult to predict when this might be.
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