Gary Johnson holds the heads of milo sorghum plants on his farm in Waukomis, Okla, Wednesday, Aug. 15, 2012. The government is on the verge of approving sorghum, a grain mainly used as

 

              Gary Johnson holds the heads of milo sorghum plants on his farm in Waukomis, Okla, Wednesday, Aug. 15, 2012. The government is on the verge of approving sorghum, a grain mainly used as
Gary Johnson holds the heads of milo sorghum plants on his farm in Waukomis, Okla, Wednesday, Aug. 15, 2012. The government is on the verge of approving sorghum, a grain mainly used as livestock feed, to make a cleaner version of ethanol. (AP Photo/Sue Ogrocki)