You're right about that: "why use switchgrass at all?" I've been informed that switchgrass isn't too great on the environment either, so I'll have to make an update to that video. And though it's true that from an economic standpoint, ethanol isn't that bad (usually), the amount of energy put into it actually takes a significant toll on the environment (counter-intuitive, I know). I've also heard that even if we turned ALL of our corn into fuel, it could only handle about 10% of the nation's demand. But what's more important? The economy or the planet? That's debatable.

Hoped this helped!

-123GP