"A key section of the Keystone pipeline has been shut down due to an oil spill in South Dakota, TransCanada said on Monday."

"A wildfire that has scorched hundreds of thousands acres of prairie and ranch land in Kansas and Oklahoma since last week was slowly being contained, authorities said on Sunday, with a rare Easter snowfall providing some help to fire-fighting teams."

"Kansas’ abundant wind power was poised to help the Sunflower State and several surrounding neighbors comply with new federal requirements to reduce carbon dioxide emissions."

"AMES, Iowa — Tim Recker has been growing corn in this state his whole life, and using his crops to make ethanol almost as long, at first by the jar for his trucks, now by the barrel for the nation. That is in large part because Congress in 2005 mandated that oil refiners blend ethanol into gasoline."

"From the air, the Midwest looks like a patchwork of cropland and pastures. But before the land was turned over to plows and center pivots, most of it was a sea of grass."

"The U.S. Environmental Protection Agency has ordered the installation of an isolation barrier to make sure that an underground fire does not reach buried nuclear waste at a suburban St. Louis landfill."