California biofuels mandates go to court - Tesoro says GHG emissions too high

Tesoro's court action seeks to prevent enforcement of the ethanol blending mandate in the California Reformulated Gas Regulation.  They argue that since the life cycle GHG emissions  of most ethanol is greater than the petroleum oxygenates it replaces and it doesn't satisfy the mandate's own requirement for "improve[d]... emissions and air quality benefits".

source: http://ethanolproducer.com/article.jsp?article_id=5004