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35 Words that Change History
renewable transport fuels obligation: an obligation placed on fuel suppliers to ensure that a certain percentage of their aggregate sales is made up of biofuels
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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