[This is Part II of a multi-part series – for Part I, click here.]

There was a time when the idea of biofuel -- energy produced by simply growing plants, instead of digging it up from the ground -- seemed like it would solve many environmental and even social problems. Of course, this was something that maybe we wanted to all believe -- simply by changing the pump at the gas station, eventually we would be able use our planes, trains and automobiles guilt-free. Then the doubts started to emerge, and like a poorly built dam, the water eventually burst.