redOrbit: U.S. military operations to protect oil imports coming from the Middle East are creating larger amounts of greenhouse gas emissions than once thought, new research from the University of Nebraska-Lincoln shows. Regulators do not currently attribute these emissions to U.S. gasoline use – but they should, the authors say. UNL researchers Adam Liska and Richard Perrin estimate that emissions of heat-trapping gases resulting from military protection of supertankers in the Persian …