Bubblin' Crude ... Tree Sap, That Is

Ye gods, some people are stupid:

Congressman [Bill] Sali [R-ID] informed us that a solution to the high price of gasoline was to make petroleum from “all those trees in our forests.” … He continued by saying there “could be up to 40 barrels of oil” in a single tree.

Er, Bill? If this were actually true, don't you think the oil companies would have figured it out by now?