The Energy Kool-Aid Acid Test
If you truly want to get real, you must separate the conversion of solar energy into food from the conversion of solar energy into mechanical motion. Plants are indispensable for food, but they are poor at turning sunlight into the motion that moves the bus.
To take the inefficient process of growing a plum and making fuel from it is just foolish when the same effort can produce many times the energy with solar cells. I'm setting nuclear aside for the moment, since we don't yet have an environmentally acceptable way to extract that energy. Until then, we need to drink reality tea, not fantasy Kool-Aid.
