There is a moment in Bill Jaeger's latest biofuels paper when his scholarly posture crumples a bit and he seems to want to shout loud enough for policymakers in Washington, D.C., to hear him all the way from Corvallis, Oregon.

"Advanced biofuels," as defined by the Energy Independence and Security Act, are renewable fuels that produce at least 50 percent less greenhouse gas emissions than the fossil fuels they replace.
