The Dallas-based company looking to build a 10 billion dollar oil refinery in southeastern South Dakota says it will be a "green" refinery. The problem with this is there is no consensus telling what "green" is. According to Denny Larson an oil refinery can't be truly "green". Our oil drilling in Canadian tar sands is not as clean as oil extracted from the middle east according to Larson. The union County Commision will consider Hyperion's request for the 3800 acre site into a planned developement.