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… is exposed to concentrations of fine particles (PM2.5) and ozone above the WHO guideline level. The current number of … the largest 3% of livestock farms in Europe. 4. Current ozone concentrations reduce potential wood and crop … in Europe by up to 15%. Background concentrations of ozone, mercury and several persistent organic pollutants in …

… dioxide (CO2), methane, nitrous oxide, halocarbons and ozone in the lower atmosphere (below about 15 km) are the … and decrease in snow packs, and the increase in surface ozone. All these have led to negative effects on water … In addition, elevated concentrations of ground level ozone have been found to have large effects on crop yields. …