ÜDS-Fen 2002-1 Soru=72

In the passage the contrast is made between ----.

Glaciers originate in areas that lie above the limit of
prominent snow. Thus in tropical climates glaciers
are only to be found at very great heights, whereas in
polar regions they flow into the sea. The largest
glaciers are found in regions receiving the heaviest
snowfall. The great glaciers of the Himalayas lie in
the path of the monsoon, which deposits on them the
full measure of its vast water vapour content. The
largest glacierized areas after Antarctica are in
Greenland, North America, and in central and south
central Asia. It has been estimated that the volume of
the world's glaciers and ice sheets exceeds
11,000,000 cubic miles which, if returned to the
oceans, would raise the sea - level by some 200 ft,
submerging all existing seaports and much land
besides.