Figure 1

A: World biodiesel (bars) and crude glycerol (lines) production between 2005 and 2010. Biodiesel production was grouped by continents; whereas crude glycerol represents the total production in the world over the years. B: Top ten biodiesel producing countries in 2010. Their production corresponds to approximately 71.3% of the total 19.21 million cubic meters of biodiesel. Production percentage is shown for each country. The production of crude glycerol was estimated assuming 0.106 L of crude glycerol per liter of biodiesel. The above figures were derived from an interactive table generated on January 11, 2012 from U.S. Energy Information Administration, International Energy Statistics, Biofuels Production (http://www.eia.gov/cfapps/ipdbproject/iedindex3.cfm?tid=79&pid=81&aid=1&cid=regions,&syid=2005&eyid=2010&unit=TBPD).