Such currents occur where air in the equatorial regions is heated strongly, expands and rises, and moves towards the poles.
(Such currents; occur; ) (air in the equatorial regions; is strongly; heated) (air in the equatorial regions; expands; ) (air in the equatorial regions; rises; )
Such currents air in the equatorial regions air in the equatorial regions air in the equatorial regions
occur is strongly expands rises
heated