In the air quality directive (2008/EC/50), the EU has set two limit values for particulate matter (PM10) for the protection of human health: the PM10 daily mean value may not exceed 50 micrograms per cubic metre (µg/m3) more than 35 times in a year and the PM10 annual mean value may not exceed 40 micrograms per cubic metre (µg/m3). In some areas time extensions have been granted by DG Environment for meeting these limit values. Information about time extensions is provided by DG Environment at: http://ec.europa.eu/environment/air/quality/legislation/time_extensions.htm
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When the urge to give flowers takes you, choose a potted plant from a local supplier. A lot of exotic flowers are grown in greenhouses great distances away. Aside from the issue of transport, there can be high social and environmental costs. For example, in Colombia, the flower industry uses enormous quantities of polluting pesticides, and in Kenya, horticulture requires a lot of water which reduces local water resources. As an alternative ask your flower shop for Fairtrade or organically produced flowers.
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