The energy bill currently in the U.S. Senate would require 21 billion gallons of biofuel from sources including prairie grasses by 2022. Perhaps this will spur usage of diverse tallgrass prairie plantings for biofuel and carbon sequestration!
From a CNN article:
"It also would rapidly ramp up the required production of ethanol, eventually to 36 billion gallons a year by 2022, a sevenfold increase. At least 21 billion gallons must be from feedstock other than corn such as prairie grasses and wood chips."