Scientists at the University of York's Stockholm Environment Institute (SEI) have released new figures showing long-term exposure to ozone air pollution is linked to one million premature deaths per year due to respiratory diseases - more than double previous estimates.

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Scientists at the University of York's Stockholm Environment Institute (SEI) have released new figures showing long-term exposure to ozone air pollution is linked to one million premature deaths per year due to respiratory diseases - more than double previous estimates.