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Published online 28 October 2008 | Nature | doi:10.1038/news.2008.1191

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First ozone measurements from Everest's peak

Expedition records stratospheric distortion and hints of pollution.

The first ozone measurement taken on the summit of Mount Everest has revealed surprisingly high levels of ozone, which scientists involved in the expedition suggest might have originated from urban pollution.

The measurement was made by British climber Ian Wade, part of the Karrimor 2005 Everest Expedition, who carried an ozone meter the size of a pack of cards to the mountain's peak, more than 8,800 metres above sea level.

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