“Supporters urge patience. In time, they say, an improved economy will boost demand for locally grown oilseed crops, such as canola, which can be turned into biodiesel.”
Canola Oil; now one of the widely used, and growing, sources of “vegetable” oils, for the home, restaurants and manufacture of packaged foods (also made more cost effective (temporarily???) due to the massive diversion of corn to ethanol).
As with most “bio-fuel” schemes, there are and will be added costs (plenty of them) that will show up outside the direct area of the “bio-fuel”, due to the changes (distortions) in supply and demand of resources diverted to produce the “bio-fuel”.
Corn used as ethanol feed stock can also produce corn oil.