Net energy of cellulosic ethanol from switchgrass

This paper shows how much more efficient switchgrass is at producing ethanol than corn.

This video is an interesting look at this whole issue:(Engineering Explained - America Was Wrong About Ethanol) https://www.youtube.com/watch?v=F-yDKeya4SU

Especially his summary, where corn creates 20 percent less GHG than gasoline and ''breaks even'' after 28 years, while switchgrass creates 94% less GHG and breaks even in it's first year.