High School Earth, Space, and Geophysical Curriculum Essentials May 2009 9. Boulder Valley School District High School Earth, Space, and Geophysical. Science Curriculum Essentials Document. Enduring Understandings. are the big ideas central to a content area that have lasting value beyond the classroom and.
See also: Coal gasification and Coal seam gas. Coal gas is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. Town gas is a more general term referring to manufactured gaseous fuels produced for sale to consumers and municipalities.
Definition - What does Sweet Gas mean? Sweet gas is the natural gas that contains very little or no the hydrogen sulfide. The H2S is undesirable due to its toxicity in addition to being corrosive to all metals used in the equipment for gas processing, handling and transportation.