Fly Green!- page 5 | Flight Today | Air & Space Magazine
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Researchers have been looking far and wide for biofuel sources, including switchgrass. (University of Wisconsin)

Fly Green!

Richard Branson and Boeing heap hope-and hype-on biofuels.

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(Continued from page 4)

About Michael Milstein

Michael Milstein is a freelance writer who specializes in science. He lives in Portland, Oregon.

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