Bars represent average annual concentrations over a limited number of monitoring stations along busy roads in major European cities (Vienna, Bruxelles, Prague, Helsinki, Paris, Berlin, Athens, Krakow, Bratislava, Stockholm and London), error bars represent the highest annual concentration measured at one single monitoring station
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When travelling to exotic places, choose your souvenirs carefully.
Trade in items such as woodcarvings, red coral or ornaments with fur or feathers, is often regulated and permits are required to bring them home. Check the rules, as there are strict laws governing exports of wildlife and you could risk having your souvenir confiscated.
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