Portland is cautious with biodiesel - 3/2/10 Portland's 5% biodiesel requirement nearing 3rd anniversary; City to delay increase - 2/24/10 http://commissionerleonard.typepad.com/commissione... UK Report Shows Biofuels Not to Blame for 2007-08 Food Price Spike - 4/6/10 http://www.biofuelsjournal.com/info/bf_articles.ht...