From the
clouds to the bedrock and below, the earth is an
ecosystem upon which all life as we know it is
based (Psalm 104:18). The clouds collect
water from the sea and return it to the land.
  Once on land, the water flows downhill to
the sea again, in a continual cycling
(Ecclesiastes 1:6,7) Where there is not
enough vegetation to hold moisture, deserts form.
In a harmonious fashion, all of these
natural processes work together to provide for
the existence of many life forms.