books.google.com - Environmental and political concerns are generating a growing interest in alternative engine fuels such as biodiesel. Biodiesel is a renewable energy source produced from natural oils and fats, which can be used as a substitute for petroleum diesel without the need for diesel engine modification. In...http://books.google.com/books/about/Biodiesel.html?id=0vBalrSH_OEC&utm_source=gb-gplus-shareBiodiesel
