Jay Leno and General Motors have unveiled a biodiesel-powered, 650 hp monster supercar named the EcoJet. The car was originally sketched by Leno and Ed on the back of a napkin, shares design cues with everything from jet aircraft and Formular One racecars. The EcoJet is powered by a Honeywell LT-101 turbine engine that runs on biodiesel, in a modified Corvette Z06 hydroformed aluminum frame with aluminum and magnesium structural and chassis components. "I drive it, wait for the harvest, get some corn and drive it some more," quipped Leno, who also said he is also converting his shop to solar power in an effort to be more environmentally conscious. :: See Jalopnik for more info and photos.