Is Biofuel Really a Viable Alternative for the Aviation Industry?

The team over at TreeHugger wondered how much land would be required to meet the biofuel equivalent of current aviation energy needs:

With a continuing stream of announcements regarding the aviation industry's drive to keep on flying while being a bit greener about it—KLM is making the first aviation biofuel test flight with passengers today—TreeHugger wondered how much land will be required to power the global aviation industry with biofuels.

The did a little back-of-the-napkin math and the answer they found is surprising (hint: it's an agriculture area equivalent in size to an entire U.S. state. A large U.S. state). In an effort not to totally steal their thunder, read about it yourself in the full post.