In the Air Quality Directive (2008/50/EC) the target value for protection of vegetation is set to 18 000 (μg/m³).h while the long-term objective is set to 6 000 (μg/m³).h. Due to lack of detailed land cover data and/or rural ozone data Iceland and Norway are not included until 2006 and onwards. Switzerland have not been included in the analysis for the entire period 1996-2007 due to the same reasons. Turkey is not included in the analysis 1996-2008.
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