Original sentence: Liquified coal emits twice as much carbon dixoide as burning oil, so carbon sequestration is proposed to prevent  an adverse impact on greenhouse gas emissions.The coal industry currently uses the credit to increase profits on coal-burning powerplants by introducing a "pre-treatment" process that satisfies the technical requirements, then burns the result the same as it would burn coal.The synfuel tax credit has been used primarily in this manner since the cheap gas prices of the 1980's killed any major efforts to create a transportation fuel with the credit, and its continuation is seen as a major "pork project" win for coal industry lobbyists, to the tune of $9 billion per annum
Edited sentence: The coal industry currently uses the credit to increase profits on coal-burning powerplants by introducing a 'pre-treatment' process that satisfies the technical requirements, then burns the result the same as it would burn coal.The synfuel tax credit has been used primarily in this manner since the cheap gas prices of the 1980's killed any major efforts to create a transportation fuel with the credit, and its continuation is seen as a major 'pork project' win for coal industry lobbyists, to the tune of $9 billion per annum.While at present synthetic fuels are primarily produced because of subsidies, they are a proven technology that offers the potential to solve the energy crisis due to the depletion of oil (Hubbert peak), at least for the next hundred years