In the air quality directive (2008/EC/50), the EU has set a limit value for benzene (C6H6) for the protection of human health: the annual mean value may not exceed 5 micrograms per cubic metre (µg/m3). The limit value comes into effect for data measured from 1 January 2010. During 2009 a margin of tolerance was in place so the annual mean should not exceed 6 micrograms per cubic metre (µg/m3).
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A rotting log is a mini nature reserve in its own right!
By removing dead or dying trees from woodland, a section of the natural nutrient-cycle can be lost. A lack of dead wood reduces species diversity by about 20 %. Avoid removing dead wood from your property. You could be doing away with thousands of invertebrate species and fungi.
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