I believe they are both located near active volcanos :)
Answer:
2.75% is the answer you're looking for.
Competition among nations for control of fresh water sources is your answer I believe.
-Ama
For the answer to the question above, I would say that the Netherlands
was one good example of what are the dangers when creating polders that
are below the sea level. The water always goes where there is a lower
level of the land. That's when the flooding occurs. You can't have a
flood on the mountain. Water will always find its way to lower areas of
land.
