Biofuels Class @ Yestermorrow Design/Build School, Warren VT, May 2-4, 2008, $300. The heart of this intensive course is the adaptation of diesel engines to operate on straight vegetable oil. Students will perform all major operations in the design and construction of a heated fuel system, including electrical wiring, fuel filter and tank installation, coolant plumbing and controls. We will briefly explore biodiesel use and production, ethanol, methane, and locating/ growing fuel sources. There is the opportunity for up to three students to adapt their own vehicle during the workshop. Available for college credit through the University of Vermont—CDAE/PSS/ENVS 95 (1 credit). (Tuition - $434.)