I would be willing to bet that GW did his homework on "switch grass" before he mentioned it several years ago in a State of the Union Address and the media barely noticed like they usually do and did not at all get the main point of the speech about it. That it is probably the BEST of the choices for a bio fuel source. Just as their vision is not long enough for them to recognize the same thing about hydrogen.
Speaking of grass that lowly hemp seed and fiber has always been one of the ultimate sources also, and may I quote from the Bible about "seed bearing herbs" being on Earth for man's use.

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"Most people can't think, most of the remainder won't think, the small fraction who do think mostly can't do it very well. The extremely tiny fraction who think regularly, accurately, creatively and without self delusion---In the long run these are the only people that count."Robert Heinlein