http://www.eea.europa.eu/data-and-maps/figures/modelled-decreases-in-ozone-concentrations-in-year-2003-due-to-the-introduction-of-european-road-vehicle-emission-standards-left-and-the-large-combustion-plant-directive-right/figure-3-9-air-pollution-1990-2004.eps/image_large
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