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… and the Montreal Protocol on Substances that Deplete the Ozone Layer, the question was raised of whether, in considering … assumptions of the international evaluation (e.g. ozone depletion is most relevant in polar regions but might still …

… as the Montreal Protocol on substances that deplete the ozone layer or the Stockholm Convention on Persistent Organic … assumptions of the international evaluation (e.g. ozone depletion is most relevant in polar regions but might still …

… when, after the long Arctic winters, sunlight returns. Ozone is depleted at the same time, and it is believed that … re-emitted within a few days. Similar springtime mercury depletion events have been seen in Antarctica. Modelling … have doubled the concentration of mercury in the surface layer of the ocean, and increased it by 25% in intermediate …