Synthetic fuel the fuel, and the fuel is less dense than conventional jet fuel allowing aircraft to fly further on the same load of fuel. The "cleanness" of these FT synthetic fuels is further demonstrated by the fact that they are sufficiently non-toxic and environmentally benign as to be considered biodegradable. This owes primarily to the near-absence of sulfur and extremely low level of aromatics present in the fuel. One concern commonly raised about the development of synthetic fuels plants is sustainability. Fundamentally, transitioning from oil to coal or natural gas for transportation fuels production is a transition from one inherently depletable
Colorado Fuel and Iron brand name until 2014 when it was closed. The mill is able to produce rail lengths of up to 480 feet (up from the current 80 feet), lengths currently possible only in a few European plants. Steelworks Museum Colorado Fuel and Iron The Colorado Fuel and Iron Company (CF&I) was a large steel concentration. By 1903, it was mainly owned and controlled by John D. Rockefeller and Jay Gould's financial heirs. While it came to control many plants throughout the country, its main plant was a steel mill on the south side of Pueblo, Colorado and was the city's main