This chart shows trends in U.S. biodiesel production, exports, and consumption from 2001 to 2017. Exports of biodiesel peaked in 2008 largely due to an unintended effect of a biodiesel tax credit in the European Union. Exports then dropped after the effect was eliminated. The increased production and consumption from 2011 onward is largely driven by the Renewable Fuel Standard. The net export of biodiesel changed from positive to negative in 2013, meaning the quantity of biodiesel imported by the U.S. exceeded quantity exported. The positive growth of net exports since 2013 is likely due to the continued effort of reducing greenhouse gas emissions and expanding regulations.