They're more optimistic about the costs ... than we are.

There's no good argument for just ignoring them.

We find that ethanol can, if it is made correctly, contribute significantly to both energy and environmental goals. However, the current way of producing ethanol with corn probably only meets energy goals.

The (past) studies that reported a negative net energy assumed one should ignore co-products.

Some of the studies use what appear to be obsolete data or data whose quality cannot be verified.

For us it is a settled issue. We hope it's a settled issue for everybody.

One of the main purposes is to explain why the studies found in the literature have such divergent results.