Fresh water is an important resource that’s
being used in increasing amounts as populations increase. As population grows,
the usual fresh water sources like rivers and streams are not going to continue
to meet that increasing demand. However, the largest source of water is still
untapped: the ocean. The problem is the salt content of seawater or brackish
water render them unusable for drinking and irrigation purposes. This is why a
lot of countries needing fresh water resort to desalination.