Fuel made from coal, corn, etc., as a substitute for a petroleum product.
- ‘As an example, synfuels released nearly twice as much carbon into the atmosphere as conventional fuels.’
- ‘The removal of the nonhydrocarbons from the synfuel enhances its eventual use as a fuel, e.g., a jet fuel.’
- ‘Companies say that synfuels could become an important energy source sooner if the U.S. government lends a hand.’
We take a look at several popular, though confusing, punctuation marks.