CONCENTRATIONS of potentially harmful ground-level ozone pollution exceeded a critical threshold somewhere in the European Union on two out of every three days this spring and summer, according to the European Environment Agency.

In a report to EU environment ministers, the EEA said that from April to August, ozone pollution exceeded levels requiring public alerts in 11 of 15 EU Member States and in five out of 10 other (mostly eastern) European countries that supplied data.

Under EU legislation, governments must inform the ...

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