Winds blow on both a
regional scale and a
global scale. Global-scale belts of moving air spiral around the Earth, driven
by the Sun's energy. As the Earth turns, the circular wind cells become spiral belts,
such that air moving toward the equator blows to the west, and air moving toward
the poles blows to the east. Regional winds may augment or diminish global
winds.
(Funk & Wagnalls
Encyclopedia of Science Year Book)
