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:
“The human mind is so complex and things are so tangled up with each other that, to explain a blade of straw, one would have to take to pieces an entire universe.... A definition is a sack of flour compressed into a thimble.”
—Rémy De Gourmont (1858–1915)
“People fall out of windows, trees tumble down,
Summer is changed to winter, the young grow old
The air is full of children, statues, roofs
And snow. The theatre is spinning round,
Colliding with deaf-mute churches and optical trains.
The most massive sopranos are singing songs of scales.”
—Wallace Stevens (1879–1955)