Compressed Air
The air engine is an emission-free piston engine using compressed air as fuel. Unlike hydrogen, compressed air is about one-tenth as expensive as fossil oil, making it an economically attractive alternative fuel.
Read more about this topic: Alternative Fuel
Famous quotes containing the words compressed and/or air:
“Give up the belief that mind is, even temporarily, compressed within the skull, and you will quickly become more manly or womanly. You will understand yourself and your Maker better than before.”
—Mary Baker Eddy (1821–1910)
“The air was clear. He seemed in ultimate peace
Except that he had no eyes. Rigid and bright
Upon the forehead, furred
With a light frost, crouched an outrageous bird.”
—Anthony Hecht (b. 1923)