In 2007, Illinois Democratic Sen. Barack Obama and Kentucky Republican Jim Bunning introduced legislation that would set the stage for large-scale production of transportation fuels from coal.

2007年，伊利诺伊州民主党参议员奥巴马和肯塔基州共和党议员邦宁(Jim Bunning)提出了一项立法，希望推动大规模生产以煤加工出的交通燃料。