Q:

How can we say that El Nino proves to be a boon for South American Coast ?  

• 1
  It causes an upswelling of rich nutrients making it the most productive in the world.
• 2
  It causes the destruction of many marine species such as anchoveta.
• 3
  It warms up normally cold surface waters off causing heavy rains.
• 4
  It enhances warm currents around every Christmas