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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The production of butter, cheese and other dairy products with high fat content accounts for high greenhouse gas emissions as well as for eutrophication of groundwater, rivers and seas. Remember: Globally, around 70 % of all agricultural land is used for livestock production.
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