Figure 2
From: Current and future climate- and air pollution-mediated impacts on human health
Number of days per year when daily maximum 8 hour running mean ozone exceeded 100 μg m-3 in each conurbation. The current UK ozone objective for protection of human health is breached if there are more than 10 such days per annum (marked by the solid black line). Data are included only when ozone monitor data capture is sufficient. More than one monitor contributes to the data series for London, West Midlands, Greater Manchester and West Yorkshire.